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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 #441 - Summary, and parameter estimates with source IDs                                           
Offshore; felt at Triangle Island off the northwest tip of Vancouver Island. Reid cites BSSA, V. 2, p. 94.
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
1912  11  17    51.00  131.00    6.50  Triangle Island  B.C.           
MILNE - 1437 MILNE - 1437 - MILNE - 1437 MILNE - 1437 -

Underlying Source Material
Source ID Publication Pub Date Pub Details
1437  Milne, W.G., 1956, Seismic Activity in Canada, west of the 113th meridian 1841-1951: Canada Dominion Obs. Pub., V. 18, No. 7, pp. 119-146  1957   
Transcription: 1912 MARCH 11. 2:17-5 a.m. phi = 51 degrees N; lambda = 131 degrees W; M=6 1/2.G. The Victoria seismograph indicated the distance to the origin of this earthquake as 300 to 400 miles. The disturbance was felt at Triangle Island off the northwest tip of Vancouver Island. Col.
 
Source ID Publication Pub Date Pub Details
752  Reid, unpub., Scrapbook and Cardfile, on microfilm at USGS in Menlo Park     
Transcription: SUBMARINE Seattle (Not felt in Washington SPT) 11 March, 1912 -SB III pg 154; Bull SSA, vol II, pg 94 Origin probably to northwest of Triangle Island, BC. Reported as felt at Valdez.
 
Source ID Publication Pub Date Pub Details
294  Bradford, Donald C., 1935, Seismic History of the Puget Sound Basin, BSSA, V. 25, No. 2, pp. 138-153  1935   
Transcription: 1912 March 11, 2 to 3 a.m.; near Triangle Island, British Columbia; submarine origin.
 


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