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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 #201 - Summary, and parameter estimates with source IDs                                           
Foreshock of a larger earthquake at 22:40; this event appears only in Rockwood, who reports: "December 8 -... At East Sound three light shocks were reported at 22h 35m; two heavy ones, rattling dishes at 22h 40m; two light ones at 23h 15m, and a somewhat heavier one at 23h 50m. ..."
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
1885  12  22  35                East Sound  WA           
CGR - 1211 - - - CGR - 1211 -

Underlying Source Material
Source ID Publication Pub Date Pub Details
1211  The American Journal of Science  1887  Third Series, Vol. XXXII, Nos. 187-192, July to December 1886, pp. 13-16 
Transcription: Rockwood, C. G. "American Earthquakes", THE AMERICAN JOURNAL OF SCIENCE, Third Series,, VOL. XXXII, Nos. 187-192, July to December 1886, pp. 13-16.

May 3, 1885 - 23h 30m local time a very light shock (III) at Olympia, W. T. Light shocks continued until 1h 30m of the 4th (U.S. Weather Review)

June 27 - 5h 26m at Olympia, W. T., a light shock (IV) east to west, with rumbling noise (U. S. Weather Review).

October 9 - 8h a moderate shock (V), south to north, at Olympia, W. T.

October 10 - Between 1h and 2h three very light shocks (III), each of about one second duration and separated by an interval of six seconds, at East Portland, Oregon (U. S. Weather Review).

December 8 - In the evening a moderate earthquake (V) occurred in the vicinity of Puget Sound, W. T. The principal shock occurred at 22h 40m, 120th meridian time, and was felt as far south as Olympia, where the motion was east-west and was sufficient to arouse sleepers. At East Sound three light shocks were reported at 22h 35m; two heavy ones, rattling dishes at 22h 40m; two light ones at 23h 15m, and a somewhat heavier one at 23h 50m ... It was also reported from Port Angeles and Salt Springs Island.

December 18 - 0h 30m a very light shock (III) at Tatoosh Island in the extreme northwest of Washington Territory. It lasted about five seconds and was followed by a second shock about ten minutes later (U. S. Weather Review).
 


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