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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 #523 - Summary, and parameter estimates with source IDs                                           
Listed only in Woodward Clyde and in WPPSS documentation. Woodward-Clyde cite the a Weston Geophysical listing in a 1976 WPPSS document. The WPPSS reference included here (1981) cites Townley and Allen, who list no earthquake at this date. Townley and Allen do have an earthquake in 1918 on 5/7 at 21:15; but they list it as felt in Snohomish County.
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
1918  23  15    47.59  122.33        W. Seattle  WA           
WWC - 1830 WWC - 1830 - - WPPSS - 2455 -

Underlying Source Material
Source ID Publication Pub Date Pub Details
1830  Woodward Clyde Consultants, unpublished  1981  Woodward-Clyde Consultants (1981), Historical Catalog (1841-1980) for the Pacific Northwest Region, unpublished catalog prepared for the Washington Public Power Supply System.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: 191806 72315 47597-122330W WG 01
 
Source ID Publication Pub Date Pub Details
2455  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: 1915 Oct 19 Fruita, Ore. TA 10
1918 Jun 7 West Seattle, Wash. TA
 


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