Cascadia Catalog 1793-1930

	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 #558 - Summary, and parameter estimates with source IDs
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	5	28	12	55		L	48.00	127.50				Alert Bay	B.C.
MILNE - 1467							MILNE - 1467		-	-		MILNE - 1467				-

Source ID	Publication	Pub Date
1467	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: 1921 MAY 28. 12:55 p.m. phi = 48.0 degrees; lambda = 127.5 degrees. ISS. The localities of Alert Bay and Bull Harbour on northern Vancouver Island felt the tremor. Este- van 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.