United States Earthquakes, 1941

By Frank Neumann, 1943, U.S. Department of Commerce, Coast and Geodetic Survey, Serial Number 655, U.S. Government Printing Office, pp. 19-20.
Reissued in: United States Earthquakes 1941-1945, 1969, U.S. Department of Commerce, Coast and Geodetic Survey, Reissued by National Earthquake Information Center, U.S. Government Printing Office.
  WASHINGTON AND OREGON
[120TH MERIDIAN OR PACIFIC STANDARD TIME]

NOTE.-More details will be found in Abstracts of Earthquake Reports for the
Pacific Coast and Western Mountain Region.

 January 3: 13:20. Pullman, Wash. Light shock caused some hanging objects to swing. Felt by several.
 February 9: 1:45.* See California and Western Nevada section.
 February 16: Portland, Oreg. Light shock reported from scattered parts of Portland.
 April 6: About 16:00. Republic, Wash. Light shock accompanied by rumbling sounds felt by few.
 April 7: 1:25. North central Washington, Okanogan County. Shock approaching intensity
	VI felt over approximately 5,500 square miles as shown on map.
 	Intensity VI at Mazama where one observer reported stove moved and furniture overturned;
		slight damage.
 	Intensity V at Nespelem, Okanogan, and Omak. At Okanogan many residents were awakened
		and some frightened; small objects and pictures moved and several residents
		reported being nearly thrown out of bed. At Omak some plaster was reported cracked.
 	Intensity IV at Aeneas, Carlton, Chelan, Loomis, Manson, Mason City, Methow, Pateros,
		Riverside, Tonasket, Twisp, Wauconda, and Winthrop.
 	Intensity I to III at Chelan Falls, Mallott, and Monse.
 	Not felt at 17 other places canvassed.
 April 12: 9:40. North central Washington. Aftershock of earthquake of April 7 felt at Chelan,
	Chelan Falls, Lakeside, Methow, Pateros, and Waterville. Strongest at Methow and
	Waterville. Not felt at 11 other places reporting.
 July 6: 19:30. Medford, Greg. Felt by fire lookouts near Medford.
 July 29: 12:17. Spokane, Wash. Slight shock felt in city by few; and recorded on the
	seismograph at Mount Saint Michaels. Faint rumbling sounds heard.
 October 19: 22:05. Seal Rock, Oreg. Slight shock.
	Door rattled and beds shook. Also felt at North Head, Wash., Weather-Bureau office.
 December 29: 10:37. Portland, Oreg. A shock of intensity VI affected about 5,000 square
	miles in the vicinity of Portland as shown on the map.

   INTENSITY VI IN OREGON:
  Portland.-Press reports a downtown display window shattered and a few other windows
	broken in various sections of the city. Felt by practically everyone.
	Many objects reported displaced and some trees and bushes shaken.
  Hillsboro.-Plaster cracked; small objects and furnishings moved.
  Sherwood.-Many frightened. Plaster cracked; trees and bushes shook moderately.
  Yamhill.-Chimneys cracked; vases overturned. Hanging objects swung; school bell rang. Many frightened.

   INTENSITY VI IN WASHINGTON:
  Vancouver.-Vases overturned; knickknacks fell. Small objects moved; trees and bushes shook slightly.
  Woodland.-Plaster cracked, small objects shifted.

   INTENSITY V IN OREGON:
  Buxton, Carlton, Huber, McMinnville, Milwaukee, Portland, Sandy, Tigard, Warren, and Zigzag.
	At Milwaukee knickknacks fell and many residents awakened. Buxton reported plaster cracked.
	All places reported either displaced objects or trees and bushes shaken.
 1941 Isoseismal Map


  Intensity IV in Washington at Amboy, Ariel, Camas, Carrols, Cougar, Orchards, Ridgefield.
  Intensity IV in Oregon at Amity, Banks, Beavercreek, Canby, Cherry Grove, Colton,
	Corbett, Dundee, Forest Grove, Gaston, Gladstone, Mist, Oregon City, Oswego,
	St. Helens, Timber, Veronia, Willamette, Wilsonville.
  Intensity I to III in Washington at Brush Prairie, Elsie, South Bend.
  Intensity I to III in Oregon at Bonneville, Boring, Clatskanie, Dilley, Gresham.
  Not felt at 15 places canvassed in Washington, nor at 42 in Oregon.


Back to:... US Earthquakes 1928-1970..... About Isoseismals and US Earthquakes

UW Dept. of Earth and Space Sciences ..... . PNW EARTHQUAKES

University of Washington Dept. of Earth and Space Sciences, Box 351310 Seattle, WA, 98195-1310
Modified 12/24/98 - If you see any problems e-mail: seis_web@ess.washington.edu