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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 #20 - Summary, and parameter estimates with source IDs                                           
Volcanic Activity Eruption of Mount St. Helens, known only from Plummer's article in the Tacoma Ledger - February 28, 1893. "Father De Smet testifies that 'in the year 1846 Mounts St, Helens and Baker became volcanoes, the latter immediately preceding the time of writing
had undergone considerable changes on the side where the crater was formed.'"
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
1846                        Mt. St. Helens             
N-WPP - 2466 - - - N-WPP - 2466 -

Underlying Source Material
Source ID Publication Pub Date Pub Details
2466  Coombs, H.A., W.G. Milne, O.W. Nuttli, and D.B. Slemmons, "Report of the Review Panel on the December 14, 1872 earthquake",  1976  Appendix D: Selected Supporting Information -- Professor Plummer's Paper on "Recent Volcanic Activity" Read before the Academy of Science - Tacoma Ledger - February 28, 1893 
Transcription: (This is part of an 8 page article - see the WPPSS table for entire text RSL 7/1995)


Father De Smet testifies that "in the year 1846 Mounts St, Helens and
Baker became volcanoes, the latter immediately preceding the time of writing
had undergone considerable changes on the side where the crater was formed,"
This corresponds in some degree to the story of John Hiaton, although the
dates are not the same. It is also reported that Mount Tacoma showed signs
of activity at this time.
 


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