Cascadia Historic Earthquake Catalog, 1793-1929
Covering Washington, Oregon and Southern British Columbia

Provided by: The Pacific Northwest Seismic Network
About the Cascadia Historic Earthquake Catalog     One-line catalog format

1793-1849 .... 1850s .... 1860s .... 1870s .... 1880s .... 1890s .... 1900s .... 1910s .... 1920s .... 1930s (not complete) .... Other Cascadia Catalogs

  
  
1920s
Event #536 - Summary, and parameter estimates with source IDs                                            Full references for Event #  536
This event could possibly be a foreshock of the larger quake that occurred shortly after 11 PM on Jan. 23, 1920. However, it was reported only in the Anacortes American, and the wording makes it unclear whether it was felt by people, or by the seismograph: "The only really strange feature about the temblor was the fact that the seismograph at Victoria registered three distinct shocks, the first one being at 9 o’clock in the evening, the second at the same time as the one felt here and the third at 2 o’clock in the morning. However, the one at 11:12 was the most severe. The other two were not felt other than at Victoria, so far as reported."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  23              Victoria  B.C.           
N-WA - 7100 - - - N-WA - 7100 -
Event #537 - Summary, and parameter estimates with source IDs                                            Full references for Event #  537
Felt in Chilliwack,Vancouver,Victoria, Bellingham, Anacortes, Blaine, Port Angeles, Friday Harbor, Everett, and Seattle. This earthquake produced damage in several communties:
.Bellingham: brick walls cracked.
Anacortes: brick walls cracked, window(s?) broken.
Victoria: Fallen plaster, broken china.
Vancouver: A few bricks fell from the tops of chimneys.
Port Ludlow: water conduit to mill shaken down.

It is well-documented and well-cataloged. A lengthy note to the BSSA from F. Napier Denison, the seismologist at Victoria, lists damages in Bellingham and Anacortes and summarizes the effects (he reports no damage on Vancouver Island). Intensity V (RF) reports were received from weather observers in Forks, Clallam Bay and Anacortes. The location, felt area, and magnitude given here were taken from the dissertation of Garry Rogers. The data base includes a half- dozen reports from weather observers, and a quite a few newspaper articles.

The Anacortes American reports that two additional quakes (Jan 21 at 9 PM and Jan 22 at 2 AM) were recorded on the seismograph at Victoria, but not felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  23  11  12    48.60  123.00    5.50  MI  Northwestern  WA  VII  MM  70000.00    km2 
N-WA - 2324 GCR - 2330 - GCR - 2330 USEQS - 956 GCR - 2330
Event #538 - Summary, and parameter estimates with source IDs                                            Full references for Event #  538
This event could possibly be an aftershock of the larger quake that occurred shortly after 11 PM on Jan. 23, 1920. However, it was reported only in the Anacortes American, and the wording makes it unclear whether it was felt by people, or by the seismograph: "The only really strange feature about the temblor was the fact that the seismograph at Victoria registered three distinct shocks, the first one being at 9 o’clock in the evening, the second at the same time as the one felt here and the third at 2 o’clock in the morning. However, the one at 11:12 was the most severe. The other two were not felt other than at Victoria, so far as reported."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  24              Victoria  B.C.           
N-WA - 7100 - - - N-WA - 7100 -
Event #539 - Summary, and parameter estimates with source IDs                                            Full references for Event #  539
The underlying source of all catalog entries is the report of the weather observer published in the MWR. No newspapers have been researched for this event.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  20  46.50  122.12        Glenoma  WA  IV  RF       
TAWA - 1165 BRAD - 326 - - TAWA - 1165 -
Event #540 - Summary, and parameter estimates with source IDs                                            Full references for Event #  540
Far to the west and north, and listed only in Milne. There is no mention of this event having been felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  28  51.00  129.00    6.50               
MILNE - 1457 MILNE - 1457 - MILNE - 1457 - -
Event #541 - Summary, and parameter estimates with source IDs                                            Full references for Event #  541
All of the catalog entries are based on the account of a single weather observer at Crater Lake, who remarked that there were 3 short earthquakes, RF Intensity V, and "Also felt at Fort Klamath." No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  14  45  42.90  122.10        Crater Lake  OR  RF       
TA-OR - 538 USEQS - 957 - - TA-OR - 538 -
Event #542 - Summary, and parameter estimates with source IDs                                            Full references for Event #  542
Far to the west and north, this is an ISS instrumental location listed only in Milne. There is no mention of this event being felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920          56.00  136.00                     
MILNE - 1458 MILNE - 1458 - - - -
Event #543 - Summary, and parameter estimates with source IDs                                            Full references for Event #  543
Listed only in Milne: " Felt in Victoria. Br." Newspaper accounts have not been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  20            Victoria  B.C.           
MILNE - 1459 - - - MILNE - 1459 -
Event #544 - Summary, and parameter estimates with source IDs                                            Full references for Event #  544
This event appears in the Woodward-Clyde catalog and in WPPSS listings. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  10      47.63  120.06            MM       
WWC - 1842 WWC - 1842 - - WWC - 1842 -
Event #545 - Summary, and parameter estimates with source IDs                                            Full references for Event #  545
A newspaper account indicates that this earthquake was probably closer to Astoria than to Portand. The Portland weather observers assigned RF Intensity III to this earthquake, while the Astoria observer called it "weak". However the Astoria Evening Budget report suggests an MM Intensity of about IV at Astoria, since it reports that of "persons awake and light sleepers ... large numbers noticed it plainly", and further reports that small objects were upset or thrown down from shelves, and a clock was stopped. It also states that the earthquake was felt in Vancouver, WA and at other points along the Columbia, but not recorded on the seismograph at Seattle. Additional newspaper accounts have not yet been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  11  20  20    45.55  122.60        Portland  OR  III  RF       
RAS - 154 WWC - 1843 - - TA-OR - 539 -
Event #546 - Summary, and parameter estimates with source IDs                                            Full references for Event #  546
Catalogers have long recognized that there is some confusion surrounding this earthquake. As Townley and Allen put it: "... Reports of a shock strong enough at Hood River to awaken sleepers and cause alarm, which was felt at Portland, and possibly over a considerable portion of Oregon and Washington, judging from an ambiguous press dispatch from Portland, suggest that the shock recorded at a number of seismographic stations may have originated in northern Oregon or southern Washington. The statement in the press dispatch referred to, that the shock was pronounced at Spokane and lasted ten minutes there, seems to have been a misstatement of the fact that the shock recorded for ten minutes on the seismograph there as a pronounced earthquake..."
Weather observers in Astoria and Portland, OR and in Longmire and Detroit, WA reported feeling this earthquake with RF intensities of III and IV. The Astoria Evening Budget reports it as being felt in Hood River, Tacoma, Seattle, and Eastern WA. Other newspapers could be researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  11  28  30  45.70  121.50        Hood River  OR  IV  MM  100000.00    mi2 
TAWA - 1166 WWC - 1844 - - RAS - 155 REID1 - 632
Event #547 - Summary, and parameter estimates with source IDs                                            Full references for Event #  547
Rassmussen cites Heck and Eppley (1958), and his listing is repeated in the Woodward-Clyde and a WPPSS listing. No other sources are known for this earthquake.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  11  29  14  10    47.67  117.40        Spokane  WA           
RAS - 157 WWC - 1845 - - RAS - 157 -
Event #548 - Summary, and parameter estimates with source IDs                                            Full references for Event #  548
All catalog listings refer back to the MWR report from Cascadia, which say that the earthquake was "felt by everyone." and that a "loud report" was heard. No newspapers have been checked.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  12  15  10  50  44.40  122.40        Cascadia  OR  III  RF       
TA-OR - 541 WWC - 1846 - - TA-OR - 541 -
Event #549 - Summary, and parameter estimates with source IDs                                            Full references for Event #  549
Other (non-earthquake) A small tidal wave sweeps beaches, washes 12 Sunset Beach cottages from their foundations. Known from Workman, Larry J. Land of Trees: Scannings From Quinault Country, the Grays Harbor Region, and Beyond 1774-1997 (Taholah, WA: The Quinault Indian Nation, 1997).
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1920  12  24                    Sunset Beach  WA           
LANGE - 7112 - - - LANGE - 7112 -
Event #550 - Summary, and parameter estimates with source IDs                                            Full references for Event #  550
East of WA and OR.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  21          52.00  125.00        eastern  WA  IV         
MILNE - 1461 MILNE - 1461 - - REID1 - 787 -
Event #551 - Summary, and parameter estimates with source IDs                                            Full references for Event #  551
All of the catalog entries are based on the report of one weather observer at Cascadia, Oregon of a RF Intensity V earthquake "felt by nearly all, over an area six by twelve miles". No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  25  12    44.40  122.40        Cascadia  OR  RF       
TA-OR - 542 USEQS - 959 - - MWR - 2276 -
Event #552 - Summary, and parameter estimates with source IDs                                            Full references for Event #  552
All catalog entries stem from one report from the weather observer at Portland, Oregon. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  12      45.55  122.60        Portland  OR  III  RF       
TA-OR - 543 WWC - 1849 - - TA-OR - 543 -
Event #553 - Summary, and parameter estimates with source IDs                                            Full references for Event #  553
Listed only by Milne; this earthquake was felt in the Queen Charlotte Islands. "No damage was reported, although pictures on the wall were made to swing."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  10  40  54.00  134.00    6.50  Masset  B.C.           
MILNE - 1462 MILNE - 1462 - MILNE - 1462 MILNE - 1462 -
Event #554 - Summary, and parameter estimates with source IDs                                            Full references for Event #  554
Listed only by Milne: " Aftershock of preceding tremor at Masset."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  10  11              Masset  B.C.           
MILNE - 1463 - - - MILNE - 1463 -
Event #555 - Summary, and parameter estimates with source IDs                                            Full references for Event #  555
Listed only by Milne: " Aftershock at Masset."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  11              Masset  B.C.           
MILNE - 1464 - - - MILNE - 1464 -
Event #556 - Summary, and parameter estimates with source IDs                                            Full references for Event #  556
Listed only by Milne: " Aftershock at Masset."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  11  30            Masset  B.C.           
MILNE - 1465 - - - MILNE - 1465 -
Event #557 - Summary, and parameter estimates with source IDs                                            Full references for Event #  557
Listed only by Milne, this is an instrumental location from the ISS. There is no mention of this event having been felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  12          53.20  133.70                     
MILNE - 1466 MILNE - 1466 - - - -
Event #558 - Summary, and parameter estimates with source IDs                                            Full references for Event #  558
Listed only by Milne, the location is from the ISS. Milne says: "The localities of Alert Bay and Bull Harbour on northern Vancouver Island felt the tremor. Estevan did not. The seismograph record at Victoria indicated a distance of 200 miles. The felt area and the official epicentre are about 250 miles apart, and on the map the former position is indicated."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  28  12  55    48.00  127.50        Alert Bay  B.C.           
MILNE - 1467 MILNE - 1467 - - MILNE - 1467 -
Event #559 - Summary, and parameter estimates with source IDs                                            Full references for Event #  559
Listed only by Milne, the location is from ISS and Milne states: "Not reported from any area."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  25          49.00  124.00                   
MILNE - 1468 MILNE - 1468 - - MILNE - 1468 -
Event #560 - Summary, and parameter estimates with source IDs                                            Full references for Event #  560
This earthquake, and sequence of earthquakes that followed a few hours later, were reported by George Eby in the BSSA (V.11, pp. 195-196):"Earth Disturbances at Dixie, Washington, September 14, 1921 ... The first disturbance came at approximately three o'clock in the morning. It was quite severe, but, since it was just a solitary jar, it could not arouse one sufficiently from sleep in time to make careful observations....(At) five o'clock .... there was a very sudden blow, accompanied by a sound like that of a deep blast of dynamite in rock. This sound was instantanous with the jar and of sufficient volume to be heard easily and distinctly....
The shaking of the ground was ... one sudden blow. The action seemed to be vertical rather than horizonal. The bed was shaken quite perceptibly and the building was also visibly shaken and agitated enough to rattle a great deal. An automobile, which was standing within three feet of the bed, was observed to have no horizontal or rocking motion. The movement was comparable to that caused by a car on hitting a sharp bump. About a minute later, there were three tremors following each other in close succession. The sound and motion of each succeeding one was exactly the same as the first, except weaker. Within the next ten minutes there were four other independent shocks, similar, but growing rapidly weaker. Then five minutes later there were several light decreasing remors, each accompanied by a sound correspondingly less audible. These diminished until they could no longer be detected...some people in Waitsburg, ten miles distant, and College Place, fifteen miles, claimed to have felt them slightly...."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  14      46.33  118.16        Dixie  WA  VI  RF       
BSSA - 2183 REID1 - 788 - - TAWA - 1167 -
Event #561 - Summary, and parameter estimates with source IDs                                            Full references for Event #  561
See comment for earlier event.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  14      46.33  118.16        Dixie  WA           
BSSA - 2183 REID1 - 788 - - BSSA - 2183 -
Event #562 - Summary, and parameter estimates with source IDs                                            Full references for Event #  562
See comment for earlier event.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  14            Dixie  WA           
TAWA - 1167 - - - TAWA - 1167 -
Event #563 - Summary, and parameter estimates with source IDs                                            Full references for Event #  563
East of WA and OR.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  16  15      47.90  114.20            IV  MM       
WWC - 1851 WWC - 1851 - - WWC - 1851 -
Event #564 - Summary, and parameter estimates with source IDs                                            Full references for Event #  564
All catalog reports stem from the report of the Portland weather observer, who gives a RF Intensity of IV and a duration of 10 seconds, and from a short report in BSSA that gives a duration of 20 seconds. The Oregonian report suggests that the quake was only felt by residents of the Mount Tabor district of Portland.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1921  22  11  20    45.55  122.60        Portland  OR  IV  RF       
N-Ore - 2337 WWC - 1852 - - TA-OR - 544 -
Event #565 - Summary, and parameter estimates with source IDs                                            Full references for Event #  565
'Earthquake History of the U.S' says: "Northwest of Cape Mendocino. Large submarine shock, but so far from land that the greatest intensity on shore was VI at Eureka. Felt at San Jose, northward into Oregon, and in northwesten Nevada. Magnitude 7.6." Another reference, 'The San Andreas Fault System, California, Chapter 6: Earthquake History, 1769-1989, by William L. Ellsworth, USGS Professional Paper 1515. 1990', says: "This event was well recorded throughout the world."
This earthquake was ** very** widely felt. Over a dozen weather observers in Oregon reported to MWR. The highest Oregon intensities reported in the MWR were RF Intensity V, at Central Point, Brookings and Oakridge, Oregon.
Townley and Allen say: "Southern Oregon. A severe shock with its epicenter at sea off Cape Mendocino, California, was felt in southern Oregon on January 31. It was reported felt in Ashland, Grants Pass, Canyonville, Roseburg, Marshfield, Medford, and Eugene. One report says that the shock was also felt in Klamath Falls."
The Oakland Tribune reports: "...At Eureka the temblor, which was of considerable duration, stopped clocks and broke dishes. At Canyonville, Oregon, beds rocked and windows were broken. Canyonville is about 225 miles south of Portland and about 125 miles north of the California line. At Roseburg, Oregon, the entire city was awakened. It was also felt at Eugene, at Portland, Seattle and other northern points. So severe was the shock that the needles of the seismograph instruments at the University of California, at Seattle and at Spokane were lifted from the recording drums. .... Telephone reports from Weaverville, Yreka, Dunsmuir, Fall River, Mills, and Weed, all in the extreme northern part of California, were that the quake had been felt, in varying degrees of intensity. It also was felt at Klamath Falls, Ore. No damage was reported."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  31  17  41.00  125.50    7.60  Eureka  CA  VI  MM  400000.00    mi2 
TA-OR - 545 USEQS - 2536 - USEQS - 2536 USEQS - 2536 USEQS - 2536
Event #566 - Summary, and parameter estimates with source IDs                                            Full references for Event #  566
Felt by only a few, reported to the MWR by two weather observers, one in Tonasket, Okanogan County, another in Clearbrook. Whatcom County.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  31  30  48.71  119.43        Tonasket  WA  III  RF       
TAWA - 1168 WWC - 1853 - - TAWA - 1168 -
Event #567 - Summary, and parameter estimates with source IDs                                            Full references for Event #  567
The underlying source for catalog entries is the report of the weather observer in Republic Washington. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  31  11    48.64  118.73        Republic  WA  II  RF       
TAWA - 1169 WWC - 1854 - - TAWA - 1169 -
Event #568 - Summary, and parameter estimates with source IDs                                            Full references for Event #  568
East of WA and OR.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  10    47.90  114.40                     
WWC - 1855 WWC - 1855 - - - -
Event #569 - Summary, and parameter estimates with source IDs                                            Full references for Event #  569
Berg and Baker were the first to catalog this earthquake. They cite the Oregonian, but the database does not yet have this article.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  26  10  15  45.53  122.62        Portland  OR  IV  MM       
BB - 1364 WWC - 1856 - - BB - 1364 -
Event #570 - Summary, and parameter estimates with source IDs                                            Full references for Event #  570
Far to the north and east. Information from Milne only, he cites the ISS and says: "This epicentre is east of any active area in western Canada."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  13          60.00  110.00                     
MILNE - 1469 MILNE - 1469 - - - -
Event #571 - Summary, and parameter estimates with source IDs                                            Full references for Event #  571
Well represented in catalogs. Milne cites the Colonis,Berg and Baker cite the Oregonian, Townley and Allen cite the S.F. Chronicle. Newspaper accounts for the data base have not yet been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  15  30  45.55  122.60        Portland  OR  IV  RF       
TA-OR - 546 WWC - 1857 - - TA-OR - 546 -
Event #572 - Summary, and parameter estimates with source IDs                                            Full references for Event #  572
Well represented in catalogs, and reported by four different weather observers in Spokane. Newspaper accounts have not been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  30  47.67  117.40        Spokane  WA  IV  RF       
TAWA - 1171 WWC - 1858 - - MWR - 2299 -
Event #573 - Summary, and parameter estimates with source IDs                                            Full references for Event #  573
Also felt in Portland. Well represented in catalogs, which cite weather observers as their source. No newspapers have been researched..
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  10  45.83  122.00        Stabler  WA  IV  RF       
TA-OR - 547 MWR - 2304 - - MWR - 2304 -
Event #574 - Summary, and parameter estimates with source IDs                                            Full references for Event #  574
The monthly weather report is cited in catalogs. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  10  16  20    46.00  119.33        Hermiston  OR  III  RF       
MWR - 2305 MWR - 2305 - - MWR - 2305 -
Event #575 - Summary, and parameter estimates with source IDs                                            Full references for Event #  575
This earthquake was described as "distinct" by Townley and Allen who cite ' Seismological Diapatches of Georgetown University' (not in the database). Berg and Baker cite Townley and Allen, and assigned MM Intensity III to this event. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  12  12          45.66  118.79        Pendleton  OR           
TA-OR - 549 WWC - 1860 - - TA-OR - 549 -
Event #576 - Summary, and parameter estimates with source IDs                                            Full references for Event #  576
Known only from Milne, who cites the Colonist. Newspapers have not been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1922  12  27  30            Victoria  B.C.           
MILNE - 1471 - - - MILNE - 1471 -
Event #577 - Summary, and parameter estimates with source IDs                                            Full references for Event #  577
Listed only in Milne: "Felt slightly at Victoria. D"
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  10  27            Victoria  B.C.           
MILNE - 1472 - - - MILNE - 1472 -
Event #578 - Summary, and parameter estimates with source IDs                                            Full references for Event #  578
Reported by weather observers as RF Intensity VI in Lakeview and RF Intensity V with duration of 60 seconds in Valley Falls, Oregon. Two aftershocks followed (see next two events). Townley and Allen say of the main event: "...This shock recorded at a number of seismographic stations; Turner at Oxford placed the origin in northern California, but the reports of perception point clearly to a source near or north of Goose Lake, in Oregon. ... The shock was felt west as far as Klamath Falls. ...; in California the duration was thirty seconds at Cedarville, Modoc Co., at Alturas plaster fell .....At Susanville, about 110 miles from the Lakeview region, an intensity of III was reported.... "
This event seems situated in a locale where the likeliest style of faulting is basin & range normal faulting. Such events are commonly accompanied by vigorous aftershock sequences. Research of newspaper accounts would be useful, both to obtain additional descriptions of the main shock, and to explore whether additional aftershocks were felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  10  29  42.16  120.33        Lake County  OR  VI  RF       
TA-OR - 550 REID1 - 642 - - BYERL - 405 -
Event #579 - Summary, and parameter estimates with source IDs                                            Full references for Event #  579
Aftershock, underlying source is the observation of the Lakeview weather observer, see previous.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  10  10  15              Lakeview  OR           
TA-OR - 550 - - - TA-OR - 550 -
Event #580 - Summary, and parameter estimates with source IDs                                            Full references for Event #  580
Aftershock, underlying source is the observation of the Lakeview weather observer, see previous.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  10  11  45              Lakeview  OR           
TA-OR - 550 - - - TA-OR - 550 -
Event #581 - Summary, and parameter estimates with source IDs                                            Full references for Event #  581
Off Cape Mendocino. 'Earthquake History of the US' says: "...strongly shook the Cape Mendocino region and toppled many chimneys in the area. This earthquake was probably associated with the Mendocino Fracture Zone." Townley and Allen say: "A severe shock was felt in northern California and southern Oregon ... The origin was at sea off Cape Mendocino." The MWR lists no reports from Oregon weather observers on this date. No newspaper accounts have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  22  40.50  124.50    7.20  G-R  off Cape Mendocino  CA  VII  MM       
TA-OR - 551 USEQS - 2537 - MISC - 2542 USEQS - 2537 -
Event #582 - Summary, and parameter estimates with source IDs                                            Full references for Event #  582
Reported "felt by many" by the weather observer in Marietta, WA. The BSSA reports: "A distinct shock was felt in Bellingham at 10:30 a.m. Plaster was broken in some store buildings. Two shocks, each lasting one second, with several seconds intervening between them, were felt in Victoria, B.C. No damage .... The seismograph of the University of Washington at Seattle showed no trace of the earthquake" Felt area and magnitude are from the dissertation of Garry Rogers. No newspaper accounts have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  12  18  30    49.00  122.70    4.10  MI  Bellingham  WA  MM  8000.00    km2 
RAS - 168 USEQS - 961 - GCR - 2330 USEQS - 961 GCR - 2330
Event #583 - Summary, and parameter estimates with source IDs                                            Full references for Event #  583
The underlying sources are reports by weather observers in Anacortes, Marietta, and Olga. No newspaper accounts have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  12  10  15  48.50  122.61        Anacortes  WA  IV  RF       
TAWA - 1174 WWC - 1863 - - TAWA - 1174 -
Event #584 - Summary, and parameter estimates with source IDs                                            Full references for Event #  584
This event is listed only by Milne, who says: "Gonzales seismograph indicated a distance of 110 miles, but this does not necessarily place the origin in British Columbia. D"
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  13  26                         
MILNE - 1475 - - - - -
Event #585 - Summary, and parameter estimates with source IDs                                            Full references for Event #  585
Far to the northwest, and listed only in Milne, who cites the ISS as the source for this information. There is no mention of the earthquake being felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  24          59.00  135.50                     
MILNE - 1476 MILNE - 1476 - - - -
Event #586 - Summary, and parameter estimates with source IDs                                            Full references for Event #  586
Far to the northwest, and listed only in Milne, who cites the ISS as the source for the location, and Gutenberg and Richter (1949) as the magnitude source. There is no mention of the earthquake being felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  25  11  32  59.00  138.00    5.75               
MILNE - 1477 MILNE - 1477 - MILNE - 1477 - -
Event #587 - Summary, and parameter estimates with source IDs                                            Full references for Event #  587
Far to the northwest, and listed only in Milne, who cites the ISS as the source for the location.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  29          59.00  135.50                     
MILNE - 1478 MILNE - 1478 - - - -
Event #588 - Summary, and parameter estimates with source IDs                                            Full references for Event #  588
Far to the northwest. Milne cites the ISS as the source for the location, and the Woodward-Clyde catalog gives a magnitude of 5.0 (source uncertain).
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  24  50.00  128.00    5.00  IML               
MILNE - 1479 MILNE - 1479 - WWC - 1864 - -
Event #589 - Summary, and parameter estimates with source IDs                                            Full references for Event #  589
Far to the northwest, and listed only in Milne, who cites the ISS. No mention of this event being felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  22          56.00  136.00                     
MILNE - 1480 MILNE - 1480 - - - -
Event #590 - Summary, and parameter estimates with source IDs                                            Full references for Event #  590
Llisted only in Milne: " At Dead Tree Point on the Queen Charlotte Islands an earthquake was felt."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  13  30            Dead Tree Point  B.C.           
MILNE - 1481 - - - MILNE - 1481 -
Event #591 - Summary, and parameter estimates with source IDs                                            Full references for Event #  591
Listed in catalogs, this event is based solely on a single MWR report from the observer in Silverton, who reported a double shock at this time. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  14  30  48.10  121.80        Silverton  WA  IV  RF       
TAWA - 1175 WWC - 1865 - - TAWA - 1175 -
Event #592 - Summary, and parameter estimates with source IDs                                            Full references for Event #  592
Listed in catalogs, this event is soley based on a single MWR report from the observer in Arlington, who reported a double shock at this time. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  14  10  48.10  121.80        Silverton  WA  IV  MM       
TAWA - 1175 WWC - 1866 - - RAS - 170 -
Event #593 - Summary, and parameter estimates with source IDs                                            Full references for Event #  593
Based solely on the report of an MWR observer in Arlington, this event is listed in catalogs, but no newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  14  45  48.08  122.08        Arlington  WA           
TAWA - 1175 REID1 - 795 - - MWR - 2314 -
Event #594 - Summary, and parameter estimates with source IDs                                            Full references for Event #  594
The source of this information is indefinite. Bradford says: "The inhabitants of Sultan and the surrounding country insist that there was a shock of severity about the time of the great earthquake in Japan of that year. ...The writer found testimony to this effect consistent over a large territory." A search of newspapers for the month of July, 1923 found no mention of such an event. Newspapers reviewed included the Seattle PI and Times, the Arlington Times, the Monroe Monitor, the Snohomish Tribune, and the Everett Herald.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923          47.80  121.80        Sultan  WA           
BRAD - 330 USEQS - 962 - - BRAD - 330 -
Event #595 - Summary, and parameter estimates with source IDs                                            Full references for Event #  595
Listed only in Milne, who cites ISS. There is no mention of this event having been felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  10  13          50.50  129.50                     
MILNE - 1482 MILNE - 1482 - - - -
Event #596 - Summary, and parameter estimates with source IDs                                            Full references for Event #  596
Listed only in Milne, who cites ISS. There is no mention of this event having been felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  11  16          53.00  131.00                     
MILNE - 1483 MILNE - 1483 - - - -
Event #597 - Summary, and parameter estimates with source IDs                                            Full references for Event #  597
Listed only in Milne: " Victoria and Saanich areas, generally, felt a rumbling earthquake. Col."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1923  11  22            Victoria  B.C.           
MILNE - 1484 - - - MILNE - 1484 -
Event #598 - Summary, and parameter estimates with source IDs                                            Full references for Event #  598
What is probably a single earthquake close to midnight Greenwich time is reported as being on 1/6 by weather observers in Weston and Milton, OR, and on 1/5 by the observer in Stanfield, OR. Reid also reports that it was felt in Pendleton at 3:15 local time. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  15  45.80  118.30        Stanfield  OR  RF       
TA-OR - 552 WWC - 1869 - - BYERL - 407 -
Event #599 - Summary, and parameter estimates with source IDs                                            Full references for Event #  599
Catalogs are based on a single report from the weather observer in Walla Walla. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  46.07  118.32        Walla Walla  WA  IV  RF       
TAWA - 1176 WWC - 1868 - - TAWA - 1176 -
Event #600 - Summary, and parameter estimates with source IDs                                            Full references for Event #  600
The report of the Seattle MWR observer is the sole underlying source for catalog entries on this event. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  10  47.59  122.33        Seattle  WA  II  RF       
TAWA - 1177 WWC - 1870 - - MWR - 2319 -
Event #601 - Summary, and parameter estimates with source IDs                                            Full references for Event #  601
This event is listed only in the Berg and Baker and the Woodward-Clyde catalogs. Berg and Baker cite Gutenberg and Richter, (1949), but there is no mention of this event having been felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  24  45      44.00  127.00    5.75  G-R  Offshore  OR           
BB - 1372 BB - 1372 - BB - 1372 BB - 1372 -
Event #602 - Summary, and parameter estimates with source IDs                                            Full references for Event #  602
Listed only in Milne. There is no mention of this event having been felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  29  50.00  130.25    6.00               
MILNE - 1485 MILNE - 1485 - MILNE - 1485 - -
Event #603 - Summary, and parameter estimates with source IDs                                            Full references for Event #  603
Newspapers needed.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  25  12  47.59  122.33        Seattle  WA  III  RF       
TAWA - 1178 WWC - 1872 - - TAWA - 1178 -
Event #604 - Summary, and parameter estimates with source IDs                                            Full references for Event #  604
Previously uncataloged. Known only from the Oregonian: "Three distinct shocks, believed to have been earthquakes, were felt here early this morning. The tremors were felt by the whole town, and so terrified many residents that they fled from their homes to the streets. The first shock was felt about 12:15 A.M., the second about 12:40 and the third at 12:45. No damage was reported."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  12  15            Dallas  OR           
N-Ore - 1195 - - - N-Ore - 1194 -
Event #605 - Summary, and parameter estimates with source IDs                                            Full references for Event #  605
Previously uncataloged. See comment for previous event.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  12  40            Dallas  OR           
N-Ore - 1195 - - - N-Ore - 1195 -
Event #606 - Summary, and parameter estimates with source IDs                                            Full references for Event #  606
Previously uncataloged. See comment for previous event.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  12  45            Dallas  OR           
N-Ore - 1195 - - - N-Ore - 1195 -
Event #607 - Summary, and parameter estimates with source IDs                                            Full references for Event #  607
All catalogs entries arise from a single report by a MWR observer. There is a slight discrepency between the observer's report and the catalog entries. The MWR gives no RF intensity, but instead says that there were 4 shocks, which were "Felt by many". No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  27  19    46.08  118.33        Walla Walla  WA           
MWR - 2321 MWR - 2321 - - MWR - 2321 -
Event #608 - Summary, and parameter estimates with source IDs                                            Full references for Event #  608
Known from Milne's catalog, and from a newspaper article from the Chilliwack Progress which was transcribed in the WPPSS documents. Milne's intensity of III appears to low, does not jibe with reports of persons awakened in Bellingham and items knockd off of mantlepieces. Newspaper reports should be sought. The report of a felt area of 6 square miles is cited in Milne must surely be wrong.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924              Chilliwack  B.C.  III  MM  6.00    mi2 
MILNE - 1486 - - - MILNE - 1486 MILNE - 1486
Event #609 - Summary, and parameter estimates with source IDs                                            Full references for Event #  609
Newspapers might be useful.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  19  30  45.73  122.54        Brush Praire  WA  IV  RF       
TAWA - 1180 WWC - 1874 - - TAWA - 1180 -
Event #610 - Summary, and parameter estimates with source IDs                                            Full references for Event #  610
Far to the north. Milne cites the ISS.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  10  17          60.00  118.00                     
MILNE - 1487 MILNE - 1487 - - - -
Event #611 - Summary, and parameter estimates with source IDs                                            Full references for Event #  611
Milne is the only catalog to list this event, he says: "An earthquake was felt slightly in Victoria. Col."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  11  19            Victoria  B.C.           
MILNE - 1488 - - - MILNE - 1488 -
Event #612 - Summary, and parameter estimates with source IDs                                            Full references for Event #  612
Milne is the only catalog that lists this event. He says: "Vancouver was the only area to feel the tremor strongly, although it was noticeable in Duncan and Victoria. D"
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1924  12  18  10            Vancouver Island  B.C.  III  MM       
MILNE - 1489 - - - MILNE - 1489 -
Event #613 - Summary, and parameter estimates with source IDs                                            Full references for Event #  613
Milne is the only catalog to list this earthquake, saying simply "A tremor was felt slightly in Victoria." The earthquake was felt more strongly in Port Townsend. From the Port Townsend Leader: "A series of three heavy earthquake shocks awoke and startled many city residents about 2:20 Tuesday morning. The shock was felt with varying degrees in different parts of the city. ..." No other newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1925  10  32            Port Townsend  WA           
MILNE - 1490 - - - N-WA - 1592 -
Event #614 - Summary, and parameter estimates with source IDs                                            Full references for Event #  614
Newspapers needed.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1925  19                      OR           
TA-OR - 554 - - - TA-OR - 554 -
Event #615 - Summary, and parameter estimates with source IDs                                            Full references for Event #  615
Severe earthquakes centered in Gallatin County, Montana, were reported felt in various places in Washington, Oregon and B.C. (Earthquake History of the United States (1973) gives an epicenter of 46N 111.2W, and a magnitude of 6.75)
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1925  28  20              Gallatin County  MT           
N-WPP - 2399 - - - TAWA - 1181 -
Event #616 - Summary, and parameter estimates with source IDs                                            Full references for Event #  616
This event appears in several catalogs. Berg and Baker cite the Oregonian of July 3, 1925, and Townley and Allen say: "Slight; felt by several" , and cite the Associated Press.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1925  11              Lakeview  OR  III  RF       
TA-OR - 556 - - - TA-OR - 556 -
Event #617 - Summary, and parameter estimates with source IDs                                            Full references for Event #  617
Needs newspapers.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1925  12  50            Port Angeles  WA  IV  RF       
TAWA - 1182 - - - TAWA - 1182 -
Event #618 - Summary, and parameter estimates with source IDs                                            Full references for Event #  618
Milne lists this earthquake as being felt in southern Alberta.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1925  10  20            Lethbridge             
MILNE - 1493 - - - MILNE - 1493 -
Event #619 - Summary, and parameter estimates with source IDs                                            Full references for Event #  619
Townley and Allen cite 'Seismological Reports of the US Coast and Geodetic Survey' and say: "Instrument board in power house rocked; few felt the shock; duration one minute." No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1925  13  47.59  122.33        Seattle  WA  III  RF       
TAWA - 1183 WWC - 1876 - - TAWA - 1183 -
Event #620 - Summary, and parameter estimates with source IDs                                            Full references for Event #  620
In Washington, Townley and Allen report this earthquake felt at "Bellingham and Marietta, Whatcom Co. At Marietta a gradual rocking for three seconds" and cite the 'Seismological Reports of the US Coast and Geodetic Survey' . Milne says: "The distance from the Victoria seismograph station to the origin of this earthquake was estimated as 6 miles, although it is likely the epicentre was under Haro Strait. Bellingham and Victoria both report a rumbling noise accompanying the tremor. No tremor was felt at Vancouver or New Westminster. Col."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1925  11  26  40  48.50  123.25        Haro Strait  WA  III  MM       
MILNE - 1494 WWC - 1877 - - RAS - 179 -
Event #621 - Summary, and parameter estimates with source IDs                                            Full references for Event #  621
Known only from the Woodward-Clyde listing.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1925  11  28  25    47.50  116.00    4.30  IML               
WWC - 1878 WWC - 1878 - WWC - 1878 - -
Event #622 - Summary, and parameter estimates with source IDs                                            Full references for Event #  622
Known only from a Penticton Herald article from 1927 transcribed in the WPPSS documents: "About a year ago, a similar shock was felt in Penticton but much more so at Naramata, at the time when tremors were experienced farther down the coast and among islands in the Pacific."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926                        Naramata  B.C.           
N-WPP - 2488 - - - N-WPP - 2488 -
Event #623 - Summary, and parameter estimates with source IDs                                            Full references for Event #  623
Far to the north and west. Milne cites the ISS as the source.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  10          66.50  130.00        Yukon  B.C.           
MILNE - 1495 MILNE - 1495 - - MILNE - 1495 -
Event #624 - Summary, and parameter estimates with source IDs                                            Full references for Event #  624
Townley and Allen cite 'Seismological Reports of the US Coast and Geodetic Survey', and say: "Trembling; felt by few; abrupt onset."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  10  28  46.07  118.32        Walla Walla  WA  III  RF       
TAWA - 1185 WWC - 1879 - - TAWA - 1185 -
Event #625 - Summary, and parameter estimates with source IDs                                            Full references for Event #  625
Townley and Allen cite 'Seismological Reports of the US Coast and Geodetic Survey', and say: " Abrupt bumping; felt by several standing; followed by tremors."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  23  56  46.07  118.32        Walla Walla  WA  IV  RF       
TAWA - 1186 WWC - 1880 - - TAWA - 1186 -
Event #626 - Summary, and parameter estimates with source IDs                                            Full references for Event #  626
At sea. Berg and Baker cite Gutenberg and Richter (1949),
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  19  50      43.00  127.50    6.00  N'  Offshore  OR           
BB - 1375 BB - 1375 - WWC - 1881 BB - 1375 -
Event #627 - Summary, and parameter estimates with source IDs                                            Full references for Event #  627
It seems that this location is likely to be in error. Milne cites the ISS as the source for this earthquake but says: "There are no reports to indicate that the tremor was felt, although the epicentre fell in a populated area."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  17          49.00  124.00    5.50  IML               
MILNE - 1496 MILNE - 1496 - WWC - 1882 - -
Event #628 - Summary, and parameter estimates with source IDs                                            Full references for Event #  628
An event on this date appears in both the Milne and Woodward-Clyde catalogs, but with rather different locations. Milne cites the ISS, and a location at 49N, 124W. Woodward-Clyde cites the Canadian (Earth Physics Branch) epicenter data file for the location and magnitude shown above.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  22          49.00  124.00    5.00  IML               
MILNE - 1497 MILNE - 1497 - WWC - 1883 - -
Event #629 - Summary, and parameter estimates with source IDs                                            Full references for Event #  629
Newspapers needed.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  10  16  45  45.73  121.48        White Salmon  WA  RF       
TAWA - 1187 WWC - 1884 - - TAWA - 1187 -
Event #630 - Summary, and parameter estimates with source IDs                                            Full references for Event #  630
Listed only by Milne, but there is no mention of the event having been felt.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  10  30  11  41  48.50  129.00    6.00               
MILNE - 1498 MILNE - 1498 - MILNE - 1498 - -
Event #631 - Summary, and parameter estimates with source IDs                                            Full references for Event #  631
Newpaper account confused.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  10  31  11  29  48.75  128.00    6.50  Victoria  B.C.           
MILNE - 1499 MILNE - 1499 - MILNE - 1499 N-UCB - 1997 -
Event #632 - Summary, and parameter estimates with source IDs                                            Full references for Event #  632
WWC location is in Idaho, east of Spokane.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  11  27  18  25    47.50  116.00            MM       
WWC - 1885 WWC - 1885 - - WWC - 1885 -
Event #633 - Summary, and parameter estimates with source IDs                                            Full references for Event #  633
Listed only by Milne: "The Shawnigan Lake district felt a slight tremor, identified by Denison as a foreshock of the following earthquake."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  12              Shawnigan Lake  B.C.           
MILNE - 1500 - - - MILNE - 1500 -
Event #634 - Summary, and parameter estimates with source IDs                                            Full references for Event #  634
This earthquake was felt from Seattle to Victoria, apparently most strongly at Anacortes, where some slight damage was reported. Townley and Allen say:"Strait of Juan de Fuca. Widely felt. Pictures fell and dishes broke at Anacortes, Skagit Co.; at Friday Harbor, San Juan Co., an explosive shock nearly threw people from their feet; at Bellingham, Flower pots were toppled over; at Port Angeles, suspended objects rattled in regular beats, and the ground swayed and trembled twenty-five or thirty seconds. At Clallam, Ediz Hook, and Marietta, lighter intensities were reported. Intensity reports of IV came from Port Townsend, Everett, and Mount Vernon.SRC&GS" . Magnitude and location from the dissertation of Dr. Garry Rogers. One possible aftershock was reported felt at Anacortes at 7:05 AM.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  12  57  48.50  123.00    5.00  MI  Victoria  B.C.  MM  30000.00    km2 
N-WA - 6057 GCR - 2330 - GCR - 2330 USEQS - 963 GCR - 2330
Event #635 - Summary, and parameter estimates with source IDs                                            Full references for Event #  635
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  12  48.50  123.50    4.30  IML  Newport  OR  IV  MM  4000.00    mi2 
N-WA - 6046 USEQS - 963 - WWC - 1886 BB - 1380 USEQS - 963
Event #636 - Summary, and parameter estimates with source IDs                                            Full references for Event #  636
Townley and Allen state: "The shock was felt from Yakima to Spokane." One newspaper account, from the U.C. Berkeley clippings collection, says:
"Spokane, Dec. 30. -- An earth shock violent enough to be felt without a seismograph, and located within 500 miles of this city, was recorded at the Gonzaga University observatory here, the director reported today. The tremor started at _:57 and continued for two minutes, he stated. Wenatchee, Wash., Dec. 30. -- A pronounced earthquake was felt here at 10:55 AM today. Buildings shook and many occupants ran into the streets. One old citizen who has felt them before, said it was the most pronounced in the 17 years he has lived here."
The Seattle PI reports the shock felt in Wenatchee, Cashmere, Chelan, Entiat (most strongly) and Yakima. Longview Orchards, fifteen miles north of Wenatchee reported an especially severe shock. The quake was lightly felt in Seattle, and reported NOT felt in Oroville and Pateros.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  12  30  57  47.70  120.20        Wenatchee  WA  VI  RF  15000.00    mi2 
N-WA - 6069 WWC - 1887 - - TAWA - 1189 USEQS - 964
Event #637 - Summary, and parameter estimates with source IDs                                            Full references for Event #  637
Felt at Davenport, Lincoln Co. This is a second shock which followed the previous event "ten minutes later" according to Townley and Allen.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1926  12  30  10            Davenport  WA           
TAWA - 1189 - - - TAWA - 1189 -
Event #638 - Summary, and parameter estimates with source IDs                                            Full references for Event #  638
Other info? Location coordinates are near Chelan.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927          47.84  120.02            III  MM       
WWC - 1889 WWC - 1889 - - WWC - 1889 -
Event #639 - Summary, and parameter estimates with source IDs                                            Full references for Event #  639
Newspaper accounts neeed.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  58  47.59  120.65        Leavenworth  WA  RF       
TAWA - 1190 WWC - 1890 - - TAWA - 1190 -
Event #640 - Summary, and parameter estimates with source IDs                                            Full references for Event #  640
Listed only by Milne, who says: " An earthquake was felt at Bull Harbour, Alert Bay and Ocean Falls off the north tip of Vancouver Island. D"
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  57            Bull Harbor  B.C.           
MILNE - 1502 - - - MILNE - 1502 -
Event #641 - Summary, and parameter estimates with source IDs                                            Full references for Event #  641
Very unusual event. Newspaper accounts would be helpful.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  27  11  56  46.10  124.10        Northhead  WA  IV  MM       
TAWA - 1191 WWC - 1891 - - RAS - 186 -
Event #642 - Summary, and parameter estimates with source IDs                                            Full references for Event #  642
This earthquake sequence is well represented in catalogs and reports. Most information available on this earthquake appears to originate in the Oregonian account: "... April 9.... Four towns in Pine and Eagle valleys reported a series of mild earthquake shocks at intervals last night and early this morning. ...Shocks were felt at Richland, Newbridge, Sparta and Halfway. The first shock was felt at about 9 o'clock, when windows were rattled in Richland and Halfway. Another followed shortly before midnight, another an hour or two later, and still another at seveal points about 6 o'clock this morning. Some reported four shocks, while some said they felt five.
The Richland union high school was the scene of an entertainment. which was interrupted by the first shcok, which rattled the windows. A lodge gathering was similarly interruped. The shocks lasted only a few seconds and were not (?) violent. No property damage was reported at any point. The first (?) tremor was the heaviest, though a good many were awakened by those later in the night, reports from Richland and Halfway said."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927    44.80  117.20        Baker  OR  RF       
TA-OR - 557 USEQS - 965 - - TA-OR - 557 -
Event #643 - Summary, and parameter estimates with source IDs                                            Full references for Event #  643
See comment for earlier event at this location.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  11  59    44.80  117.20        Richland  OR  IV  MM       
N-Ore - 2547 WWC - 1893 - - BB - 1377 -
Event #644 - Summary, and parameter estimates with source IDs                                            Full references for Event #  644
See comment for event on previous day at this location.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927      44.80  117.20        Richland  OR  IV  MM       
N-Ore - 2547 WWC - 1894 - - BB - 1378 -
Event #645 - Summary, and parameter estimates with source IDs                                            Full references for Event #  645
See comment for event on previous day at this location.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927      44.80  117.20        Richland  OR  IV  MM       
N-Ore - 2547 WWC - 1895 - - BB - 1379 -
Event #646 - Summary, and parameter estimates with source IDs                                            Full references for Event #  646
Far to the north and west. Listed only in the Woodward-Clyde catalog.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  21  56    50.15  127.85    5.50  IML               
WWC - 1896 WWC - 1896 - WWC - 1896 - -
Event #647 - Summary, and parameter estimates with source IDs                                            Full references for Event #  647
Listed only in Milne, who cites the ISS for the location and says: "Bull Harbour, Alert Bay, and Ocean Falls as well as Port Hardy felt a tremor. The ISS epicentre is some 2 degrees south of the felt area, in a populated region where the tremor was not felt. D"
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927    49.00  124.00        Bull Harbour  B.C.           
MILNE - 1503 MILNE - 1503 - - MILNE - 1503 -
Event #648 - Summary, and parameter estimates with source IDs                                            Full references for Event #  648
Listed only by Milne, who says: "Estevan, Bull Harbour, Alert Bay and Ocean Falls all felt an earthquake. The epicentre is probably just off the northwest tip of Vancouver Island."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  27  58            Estevan  B.C.           
MILNE - 1504 - - - MILNE - 1504 -
Event #649 - Summary, and parameter estimates with source IDs                                            Full references for Event #  649
From Townley and Allen: "Humboldt Bay, California. This severe shock was felt from Fort Seward to the Oregon border; so probably was felt in the southwest corner of Oregon. It was felt in Cresent City, but not in Gold Beach..." No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  20  12            Humboldt Bay  CA           
TA-OR - 558 - - - TA-OR - 558 -
Event #650 - Summary, and parameter estimates with source IDs                                            Full references for Event #  650
Known only from two Penticton Herald articles transcribed in the WPPSS documents: "A slight but perceptible, earthquake shock was felt in Penticton early on Monday shortly after 7 o'clock. Of brief duration, it was probably more pronounced on the beaches than in the town. In some homes, chairs were rocked and in others the tremor was barely felt..."

"Naramata. A slight earth tremor was felt here ...noticed only in certain locations."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  26                Penticton  B.C.           
N-WPP - 2488 - - - N-WPP - 2488 -
Event #651 - Summary, and parameter estimates with source IDs                                            Full references for Event #  651
Far to the north and west. Listed only in Milne.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  10  24  59  57.50  137.00    7.00               
MILNE - 1505 MILNE - 1505 - MILNE - 1505 - -
Event #652 - Summary, and parameter estimates with source IDs                                            Full references for Event #  652
Far to the north and west. Listed only in Milne.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  10  25          56.40  136.00                     
MILNE - 1506 MILNE - 1506 - - - -
Event #653 - Summary, and parameter estimates with source IDs                                            Full references for Event #  653
Listed only in Milne: "An earthquake was felt generally in Vancouver and in the communities directly east of there. It was not felt at Victoria, nor was it recorded on the seismographs." No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  10  29                    Vancouver Island  B.C.           
MILNE - 1507 - - - MILNE - 1507 -
Event #654 - Summary, and parameter estimates with source IDs                                            Full references for Event #  654
Far to the west and north. Listed only in Milne, who cites the ISS.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  11  12          56.40  136.00                     
MILNE - 1508 MILNE - 1508 - - - -
Event #655 - Summary, and parameter estimates with source IDs                                            Full references for Event #  655
Far to the west and north. Listed only in Milne, who cites the ISS.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  11  21          56.40  136.00                     
MILNE - 1509 MILNE - 1509 - - - -
Event #656 - Summary, and parameter estimates with source IDs                                            Full references for Event #  656
Far to the west and north. Listed only in Milne, who cites the ISS.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1927  12  31          56.40  136.00                     
MILNE - 1510 MILNE - 1510 - - - -
Event #657 - Summary, and parameter estimates with source IDs                                            Full references for Event #  657
Listed in several catalogs, supported by a newspaper account from the U.C. Berkeley scrapbook. Milne says: "The Abbotsford-Hunglington area felt an earthquake. Maple Falls, Glacier, Sumas and Deming in the general region also felt the tremor slightly, but Bellingham did not. D"
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  24  45  49.10  122.20    3.00  IML  Abbotsford  B.C.  III  MM       
MILNE - 1511 RAS - 187 - WWC - 1897 MILNE - 1511 -
Event #658 - Summary, and parameter estimates with source IDs                                            Full references for Event #  658
Listed in several catalogs, but no newspapers have been researched. ' US Earthquakes, 1928' (Heck and Bodle) say that this earthquake was "Generally felt. Strong shake and roaring. Cracking of plaster and paper. People generally alarmed."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  52    47.80  121.70        Startup  WA  VI  MM       
USEQS - 966 USEQS - 966 - - USEQS - 966 -
Event #659 - Summary, and parameter estimates with source IDs                                            Full references for Event #  659
Listed in several catalogs. The felt area and magnitude listed above are from the 1983 dissertation of Garry Rogers. 'Earthquake History of the US (1973) says "Vancouver Island, B.C. Strong. Fairly strong at Tatoosh Island; loud roar. Felt at Port Townsend, Wash." Milne says: "The Victoria seismograph indicates an epicentre about 100 miles northwest of the city. Alberni, Bamfield, and Pachena Point felt the tremor most severely. At Alberni it was like a loud report, and near Bamfield small tidal waves were reported. Vancouver and Nanaimo reported the tremor as very slight. It was also felt at Abbotsford, Duncan, Cowichan, Victoria, Port Renfrew, Tatoosh and Destruction Islands. The epicentre was probably in the region of the Alberni canal. D, Prov." No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  48.50  125.00    5.80  MI  Alberni  B.C.  IV  MM  120000.00    km2 
MILNE - 1512 USEQS - 967 - GCR - 2330 MILNE - 1512 GCR - 2330
Event #660 - Summary, and parameter estimates with source IDs                                            Full references for Event #  660
Known only from a Penticton Herald article transcribed in the WPPSS documents: "Several residents of Penticton, particularily in the Skaha Lake section, reported a slight earth tremor ... Mr. McDowell states that the 'quake' was like a heavy truck rumbling over a bridge."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  28                Penticton  B.C.           
N-WPP - 2489 - - - N-WPP - 2489 -
Event #661 - Summary, and parameter estimates with source IDs                                            Full references for Event #  661
"United States earthquakes 1928" by Heck and Bodle states that this earthquake was on July 5 at 21:30 "Pacific Coast Time", and was felt by a few in Waldheim, Washington.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  30    48.10  121.60                     
RAS - 190 RAS - 190 - - - -
Event #662 - Summary, and parameter estimates with source IDs                                            Full references for Event #  662
Meteorite Meteor. Listed in: Workman, Larry J. Land of Trees: Scannings From Quinault Country, the Grays Harbor Region, and Beyond 1774-1997 (Taholah, WA: The Quinault Indian Nation, 1997).
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  16                    Meteor             
LANGE - 7112 - - - LANGE - 7112 -
Event #663 - Summary, and parameter estimates with source IDs                                            Full references for Event #  663
'United States Earthquakes 1928' (Heck and Bodle) reports a "slight shock at Newport also felt at other towns within 10-mile radius." Berg and Baker report an event of MM Intensity IV felt at Newport and Eugene. No newspapers have been researched.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  40  44.70  124.10        Newport  OR  IV  MM  314.00    mi2 
BB - 1380 BB - 1381 - - BB - 1380 BYERL - 413
Event #664 - Summary, and parameter estimates with source IDs                                            Full references for Event #  664
To the east. This event is only known from the Woodward-Clyde catalog, and is not listed in 'United States Earthquakes 1928' (Heck and Bodle).
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  36    42.10  115.20    5.20  IML               
WWC - 1903 WWC - 1903 - WWC - 1903 - -
Event #665 - Summary, and parameter estimates with source IDs                                            Full references for Event #  665
Listed only in the Woodward-Clyde catalog. This event is listed in 'United States Earthquakes 1928' (Heck and Bodle) which reports it as on Sept. 4 at 23:18 "Pacific Coast Time" : "Darrington, Wash. Generally felt over area 10 miles in radius.Trembling, two shocks."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  18    48.30  121.60                     
WWC - 1904 WWC - 1904 - - - -
Event #666 - Summary, and parameter estimates with source IDs                                            Full references for Event #  666
At sea. Listed only in Berg and Baker, who cite Gutenberg and Richter (1949).
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1928  11  12  36      43.50  130.25        Offshore  OR           
BB - 1382 BB - 1382 - - BB - 1382 -
Event #667 - Summary, and parameter estimates with source IDs                                            Full references for Event #  667
Far to the northwest. Listed only in MIlne.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1929  11  31  51.50  130.75    6.00               
MILNE - 1513 MILNE - 1513 - MILNE - 1513 - -
Event #668 - Summary, and parameter estimates with source IDs                                            Full references for Event #  668
Meteorite Brilliant light flashes in the sky." Listed in: Workman, Larry J. Land of Trees: Scannings From Quinault Country, the Grays Harbor Region, and Beyond 1774-1997 (Taholah, WA: The Quinault Indian Nation, 1997).
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1929  12                    Meteor             
LANGE - 7112 - - - LANGE - 7112 -
Event #669 - Summary, and parameter estimates with source IDs                                            Full references for Event #  669
This event is cataloged only in Milne. The Port Townsend Leader reports that the earthquake was felt in distinctly in Port Townsend and were also felt atPort Angeles. Milne says it was: "Felt very slightly at Victoria. Times"
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1929  22  18            Port Townsend  WA           
N-WA - 1593 - - - N-WA - 1593 -
Event #670 - Summary, and parameter estimates with source IDs                                            Full references for Event #  670
Landslide or Rockfall Report of vast earth upheaval on the Queets near M. M. Kelly Ranch. Listed in: Workman, Larry J. Land of Trees: Scannings From Quinault Country, the Grays Harbor Region, and Beyond 1774-1997 (Taholah, WA: The Quinault Indian Nation, 1997).
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1929                    Queets River  WA           
LANGE - 7112 - - - LANGE - 7112 -
Event #671 - Summary, and parameter estimates with source IDs                                            Full references for Event #  671
Listed only in Milne: "The epicentre of this tremor was between 1 degree and 2 degrees south of the area of maximum damage, in a region that was not heavily populated. The earthquake was felt as far north as Ketchikan, Alaska, and Anyox, B.C. and to the east as far as Terrace, Skeena and Lakelse. Prince Rupert does not appear to have been in the area of maximum damage, but at Haysport, a short distance southeast of Prince Rupert, goods were knocked off shelves. Centres on the Queen Charlotte Islands suffered greatly. At Massett, water was splashed out of tanks, trees were reported to have swayed, and houses shook violently. The Prince Rupert paper stated that people were thrown to the ground. At Queen Charlotte City dishes were broken, clocks were stopped, and a foot tidal wave was reported. Nearby at Skidgate there was a tidal wave,and there were fissures on the beach. At Sandspit 500 feet of the beach was reported to have disappeared into the sea. Further south at Lockeport the crest of a hill was dislodged, and close by at Rose Harbour chimneys were toppled. From these reports it would appear that the major damage was along the east shore of the Queen Charlotte Islands, but this is probably because that was the only settled portion of the region. Certainly the epicentre must have been quite close to Queen Charlotte city and Skidegate, probably just west of Graham Island. Such origin is indicated on the map."
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1929  26  42  51.00  131.00    7.00  Queen Charlotte City  B.C.  VII  MM       
MILNE - 1515 MILNE - 1515 - MILNE - 1515 MILNE - 1515 -
Event #672 - Summary, and parameter estimates with source IDs                                            Full references for Event #  672
Listed only in Berg and Baker, who cite Gutenberg and Richter (1949).
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1929  14  19      43.00  130.00    5.25  G-R  Offshore  OR           
BB - 1383 BB - 1383 - BB - 1383 BB - 1383 -
Event #673 - Summary, and parameter estimates with source IDs                                            Full references for Event #  673
Far to the northwest. Listed only by Milne.
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1929  17  11  17  51.00  131.00    6.25               
MILNE - 1516 MILNE - 1516 - MILNE - 1516 - -
Event #674 - Summary, and parameter estimates with source IDs                                            Full references for Event #  674
Listed only by Milne, who says: "Severe on Graham Islands. D"
TIME LOCATION MAGNITUDE MAX. INTENSITY FELT AREA
YR MO DAY HR MIN AM/PM Time
Type
LAT(N) LON(W) DEP
(km)
MAG Mag
Type
Felt
Plc.
Felt
St.
Inten-
sity
Int.
Type
Felt
Area
Felt
Area
Int.
Felt
Area
Units
1929  12  14                    Graham Islands  B.C.           
MILNE - 1517 - - - MILNE - 1517 -

UW Logo ESS Logo