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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 #503 - Summary, and parameter estimates with source IDs                                           
Explosion The Oregonian reports one hundred pounds of blasting powder set off in Portland.
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
1917                        explosion             
N-Ore - 1995 - - - N-Ore - 1995 -

Underlying Source Material
Source ID Publication Pub Date Pub Details
1995  Oregonian  1917  UC Berkeley Seismograph Station Clippings Collection 
Transcription: Powder cause of "Earthquake" - One hundred pounds of blasting powder, set off on the right of way of the O. - W. R. & N. for the regrade work now under way there, caused the earth to tremble in the vicinity of East Thirty-fifth and Tillamook streets Wednesday. Some believed it to have been an earthquake shock, but the facts were learned from Commissioner of Public Works Barbur's office yesterday.
 


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