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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 #333 - Summary, and parameter estimates with source IDs                                           
Not reported felt. Known only from the transcribed article from the Victoria Daily Colonist included in the WPPSS documents: "The photograph traced from the seismograph ... recorded ... at 7:48 and 7:51 A.M. of the same day ...two sharp but small vibrations, and from their appearance seem of local origin."
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
1900  11  18  48                           
N-WPP - 2497 - - - - -

Underlying Source Material
Source ID Publication Pub Date Pub Details
2497  Washington Public Power Supply System, Preliminary
Safety Analysis Report, Ammendment 23,
WPPSS Nuclear Project No. 1, 1300 MW Nuclear Power Plant, Vol. 2A. 
1977  Tables 2R-E18 and 2R-E14D. Victoria Daily Colonist, Victoria, B.C., December 2, 1900 
Transcription: November 18, 1900
Victoria Daily Colonist, Victoria, B.C., December 2, 1900
"RECENT EARTHQUAKE
"Why the one recently felt here was not recorded by seismograph.

"For the benefit of those who thought they felt an earthquake on
the afternoon of Sunday a fortnight ago, a Colonist representative has
obtained the following information from the meteorological office upon
the subject: The photograph traced from the seismograph installed in
the basement of the old customs offices, recorded no Less than five
distinct shocks during the week ending Saturday, November 24. The first
shock occurred at 6:28 a.m. on Sunday the 18th, and from the form of
vibration may have originated some hundreds of miles away. The next
occurred at 7:48 and 7:51 A.M. of the same day as two sharp but small
vibrations, and from their appearance seem of local origin Strange (at
least to the uninitiated) the shock felt in the afternoon did not cause
the instrument to move, though it has been conclusively proved that this
instrument is so sensitive that it is constantly recording earthquakes
that occur at all quarters of the globe.

"The cause for this is that the recording part of this instrument
which consists of a long horizontal broom, is suspended pointing exactly
south; therefore should the earthquake waves travel east or west they
cause the broom to swing; where as, as sometimes happens, these waves
travel directly from north or south, when as they pass under this station,
they can only tip the broom up and down, but not sideways. -It so happens
that the Sunday afternoon quake did travel from north or south, for from
further information, it is learned that it was distinctly felt on the
Gorge Road, at the Pacific club, on fort street, and in a house on the
Dallas road., near Menzies street, the time being about 2 o'clock before
the close of the week, no less than three more shocks were recorded and
none of these were of local origin, on the contrary they were of a type
of vibrations whose birth place was probably the other side of the
world."
 


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