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 #105 - Summary, and parameter estimates with source IDs
Most catalogs include a report of light shocks from Dec. 16 to Jan. 4, and cite Rockwood, who actually gave no starting date. He said "A report from Walla Walla, Jan. 4, 1873, says that light shocks had occurred daily up to that time."
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
1872	12	16					46.00	118.30				Walla Walla	WA
HOLD2 - 1230							USEQS - 918		-	-		RAS - 22				-

Underlying Source Material

Source ID	Publication	Pub Date	Pub Details
1046	Townley, S. D. and M. W. Allen, 1939, Descriptive Catalog of Earthquakes of the Pacific Coast of the United States 1769-1928, Chap. III Earthquakes in Washington, 1883-1928, BSSA, V. 29, No. 1, pp. 259-268	1939
Transcription: 1872 December 16 to 1873 January 4. Walla Walla. Light shocks almost daily.-CGR

Source ID	Publication	Pub Date	Pub Details
918	U. S. Dept. of Commerce, 1973, Earthquake History of the United States, V. 41-1, revised ed., pp. 89-96	1973
Transcription: Dec. 16 to Jan 4, 1873. - Walla Walla, Wash 46.0 118.3 - - Do.

Source ID	Publication	Pub Date	Pub Details
2414	Washington Public Power Supply System, "WPPSS Nuclear Project No. 2, Final Safety Analysis Report, Volume 1, Amendment 18" September 1981	1981	Table 2.5-6
Transcription: 1872 Walla Walla, Wash. Period from Dec. 16, TA 1872 to Jan. 4, 1873 Many light shocks felt.

Source ID	Publication	Pub Date	Pub Details
209	Bradford, Donald C., 1935, Seismic History of the Puget Sound Basin, BSSA, V. 25, No. 2, pp. 138-153	1935
Transcription: 1872 December 16, to 1873, January 4; Walla Walla; light shocks almost daily. C.G.R.

Source ID	Publication	Pub Date	Pub Details
1202	The American Journal of Science and Arts	1874	Third Series, Vol. VI, Nos. 31-36, July to December 1873, pp.40-41
Transcription: Rockwood, Prof. C. G. "Notices of Recent Earthquakes", THE AMERICAN JOURNAL OF SCIENCE AND ARTS, Third Series, Vol. VI, Nos. 31-36, July to December 1873, pp.40-41. December 14 and 15, 1872 - Fuller accounts have been received of the earthquake in Oregon and Washington Territory on these dates. Shocks occurred at intervals from this evening of Dec. 14 to the evening of Dec. 17. They were felt from Eugene City, Oregon, north into British Columbia, and on both sides of the mountains, i.e. over an area of 200 square miles; but were most severe in the neighborhood of Puget Sound. The following is from the "Pacific Tribune", Dec. 21, 1872 (Olympia W. T.): "Capt. James S. Lawson took a scientific observation of the earthquake on Saturday night last. Its direction was from the south to the north at first; subsequently it changed around to a course from the southwest to the northeast. It was timed with a chronometer watch and the direction noted by a swinging lamp. In an unofficial report to Prof. Davidson, at San Francisco, Capt. Lawson says: (On December 14, 1872) Shock occurred precisely at 9h 40 1/2m P. M. It commenced with a light movement, gradually increasing for eighteen or twenty seconds. Then came the heavy shock, lasting four or five seconds; then it gradually decreased. In six minutes after the first shock there was another, followed by two others one minute apart. At 10h 12m there was another shock, and after 11 P. M. there were five others. During the night other shocks were reported (I did not feel them), at 3 and 5 o'clock. On Sunday night at 6h 37 1/2 m a light shock. December 16, at 9h 17m, another shock." A report from Walla Walla, Jan. 4, 1873, says that light shocks had occurred daily up to that time.

Source ID	Publication	Pub Date	Pub Details
977	U. S. Dept. of Commerce, 1973, Earthquake History of the United States, V. 41-1, revised ed., pp. 89-96	1973
Transcription: 1872. December 16 to January 4, 1873. Walla Walla, Wash. A series of moderate shocks.

Source ID	Publication	Pub Date	Pub Details
1230	Holden, E.S., 1898, A Catalog of Earthquakes on the Pacific Coast 1769-1897, Smithsonian Miscellaneous Collections, 1087	1898
Transcription: 1872. December 16 to 1873, January 4; Walla Walla. Light shocks almost daily.__C.G.R.

Source ID	Publication	Pub Date	Pub Details
22	Rasmussen, Norman, 1967, Washington state earthquakes 1840 through 1965, BSSA V. 57, No. 3, pp. 463-476	1967
Transcription: 22 1872-73 See Remarks - Walla Walla 1,4 felt many light shocks;