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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 #522 - Summary, and parameter estimates with source IDs                                           
Catalog entries come from the report from the weather observer at the North Fork Sauk River. No newspapers have been checked.
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  5  7  1  15  P  P  48.40  121.55        North Fork, Sauk River  WA  IV  RF       
TAWA - 1159 WWC - 1829 - - TAWA - 1159 -

Underlying Source Material
Source ID Publication Pub Date Pub Details
1829  Woodward Clyde Consultants, unpublished  1981  Woodward-Clyde Consultants (1981), Historical Catalog (1841-1980) for the Pacific Northwest Region, unpublished catalog prepared for the Washington Public Power Supply System.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: 191805 72115000 48400-121550W IV R 4 01
 
Source ID Publication Pub Date Pub Details
321  Bradford, Donald C., 1935, Seismic History of the Puget Sound Basin, BSSA, V. 25, No. 2, pp. 138-153  1935   
Transcription: 1918 May 7; 48 degrees 06' north, 121 degrees 22' west; IV; North Fork, Sauk River; rumbling noise.
 
Source ID Publication Pub Date Pub Details
2513  Washington Public Power Supply System, Preliminary
Safety Analysis Report, Ammendment 23,
WPPSS Nuclear Project No. 1, 1300 MW Nuclear Power Plant, Vol. 2A. 		 1977  Table 2R-E1 
Transcription: 73 1918 May 07 N. Fork Sauk River iv TA(266)
1918 May 07 48 06'N., 121 22'W iv BR(148)
1918 May 07 21:15 N. Fork Sauk River iv RA(466)
 
Source ID Publication Pub Date Pub Details
1159  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: 1918 May 7. 1:15 p.m. IV. North Fork Sauk River, Snohomish Co. Gradual trembling; duration five seconds.-MWR, 46, 243.
 
Source ID Publication Pub Date Pub Details
146  Rasmussen, Norman, 1967, Washington state earthquakes 1840 through 1965, BSSA V. 57, No. 3, pp. 463-476  1967   
Transcription: 146 1918 May 7 21:15 North Fork, Sauk R. IV 4
 
Source ID Publication Pub Date Pub Details
782  Reid, unpub., Scrapbook and Cardfile, on microfilm at USGS in Menlo Park     
Transcription: North Fork, Sauk River 48 degrees 06' N; 121 degrees 22' W PST (Sun) 2:15 pm 7 May, 1918 GMT 21h 15m IV 1 shock duration 5 seconds -MWR 243
 
Source ID Publication Pub Date Pub Details
2386  Washington Public Power Supply System, Preliminary
Safety Analysis Report, Ammendment 23,
WPPSS Nuclear Project No. 1, 1300 MW Nuclear Power Plant, Vol. 2A. 		 1977  Table 2R E-9 
Transcription: 73 1918 May 7 North Fork Sauk River, Wash.
 
Source ID Publication Pub Date Pub Details
2255  Monthly Weather Review  1918  V. 46, p. 243 
Transcription: Date: May 7, 1918
Time (Greenwich Civil): 21: 15
Location: North Fork Sauk River, Wash.
Latitude (deg., min.): 48 06
Longitude (deg.,min.): 121 22
RF Intensity: 4
Number of Shocks: 1
Duration (sec.): 05
Sounds: Loud
Remarks: Rumbling, gradual trembling E-W.
Observer: C.M. Mackintosh
 


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