Individual Event Report
 
| Event #541 - Summary, and parameter estimates with source IDs                                             | 
 
| 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  | 
4  | 
14  | 
3  | 
45  | 
A  | 
P  | 
42.90  | 
122.10  | 
  | 
  | 
  | 
Crater Lake  | 
OR  | 
V  | 
RF  | 
  | 
  | 
  | 
 
| TA-OR - 538 | 
USEQS - 957 | 
 -  | 
 -  | 
TA-OR - 538 | 
 -  |  
 
 Underlying Source Material
| Source ID | 
Publication | 
Pub Date | 
Pub Details | 
 
| 957  | 
U. S. Dept. of Commerce, 1973, Earthquake History of the United States, V. 41-1, revised ed., pp. 89-96  | 
1973  | 
  | 
 
| Transcription: Apr.    14        15:45          Crater Lake, Oreg                   42.9    122.1       -         V         3-53 | 
 
|   | 
 
| Source ID | 
Publication | 
Pub Date | 
Pub Details | 
 
| 629  | 
Reid, unpub., Scrapbook and Cardfile, on microfilm at USGS in Menlo Park  | 
  | 
  | 
 
| Transcription: Crater Lake 42 degrees 50' N; 122 degrees ?' W PST  3:45  am 14  April,  1920  GMT 11h 45m V, 3 shocks -MWR July 434 Also felt at Fort Klamath 35 km to south. | 
 
|   | 
 
| Source ID | 
Publication | 
Pub Date | 
Pub Details | 
 
| 393  | 
Byerly, Perry, 1952, Pacific Coast Earthquakes, Condon Lecture, pp. 33-38  | 
1952  | 
U.W. Library, N979 B991p, Special Collections)  | 
 
| Transcription: 1920, April 14 V Crater Lake, Klamath County. Three shocks; felt at Fort Klamath. | 
 
|   | 
 
| Source ID | 
Publication | 
Pub Date | 
Pub Details | 
 
| 1841  | 
Woodward Clyde Consultants,  unpublished  | 
1981  | 
Woodward-Clyde Consultants (1981), Historical Catalog (1841-1980) for the Pacific Northwest Region, unpublished catalog prepared for the Washington Public Power Supply System.  Copy provided to UW in 1993.  | 
 
| Transcription: 192004142345000 42900-122100  V                  NO 5 01 | 
 
|   | 
 
| Source ID | 
Publication | 
Pub Date | 
Pub Details | 
 
| 1016  | 
U. S. Dept. of Commerce, 1973, Earthquake History of the United States, V. 41-1, revised ed., pp. 89-96  | 
1973  | 
  | 
 
| Transcription: 1920. April 14. Crater Lake, Oreg. Three shocks felt at Fort Klamath. | 
 
|   | 
 
| Source ID | 
Publication | 
Pub Date | 
Pub Details | 
 
| 2268  | 
Monthly Weather Review  | 
1920  | 
V. 48, p 434  | 
 
Transcription: Date: April 14, 1920 Time (Greenwich Civil):  11:45 Location:  Crater Lake, Oregon Latitude (deg., min.):  42 50 Longitude (deg.,min.):  122 RF Intensity:  5 Number of Shocks:  3 Duration (sec.):  Short Sounds:  Remarks:Also felt at Fort Klamath Observer:H.F. Brown | 
 
|   | 
 
| Source ID | 
Publication | 
Pub Date | 
Pub Details | 
 
| 1358  | 
Berg and Baker, 1963,  Oregon Earthquakes, 1841 through 1958, BSSA, V. 53, No. 1, pp. 95-108  | 
1963  | 
  | 
 
| Transcription: 1920   Apr 14   11:45:--   Apr 14   3:45 pm (PST)   Crater Lake   V*   10   Three shocks. (10) | 
 
|   | 
 
| Source ID | 
Publication | 
Pub Date | 
Pub Details | 
 
| 538  | 
Townley,  S.D. and M.W. Allen, 1939, Descriptive Catalog of earthquakes of the Pacific Coast of the United States 1769 to 1928, Chapter II, Earthquakes in Oregon--1846-1928, BSSA, V. 29, No. 1, pp. 253-258.  | 
1939  | 
  | 
 
| Transcription: 1920 April 14. 3:45 a.m. V. Crater Lake, Klamath Co. Three shocks; felt at Fort Klamath.- MWR, 48, 434. | 
 
|   | 
 
 
 
 
 
 
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