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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

  
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  14  45  42.90  122.10        Crater Lake  OR  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1841  Woodward Clyde Consultants, unpublished  1981  Woodward-Clyde Consultants (1981), Historical Catalog (1841-1980) for the Pacific Northwest Region, unpublished catalog prepared for the Washington Public Power Supply System.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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