1949 Olympia earthquake
  Olympia Seattle Tacoma  | |
| Date | April 13, 1949 |
|---|---|
| Origin time | 19:55:44 UTC [1] |
| Duration | ~ 20 s [2] |
| Magnitude | 6.7 Mw [1] |
| Depth | 50 km (31 mi) [1] |
| Epicenter | 47°00′N 122°32′W / 47.0°N 122.53°WCoordinates: 47°00′N 122°32′W / 47.0°N 122.53°W [1] |
| Areas affected |
Puget Sound region Washington United States |
| Total damage | $25 million [3] |
| Max. intensity | VIII (Severe) [3] |
| Peak acceleration | .25g [2] |
| Casualties |
8 killed [3] Many injured [3] |
The 1949 Olympia earthquake occurred on April 13 at 12:55:44 local time with a moment magnitude of 6.7 and a maximum Mercalli Intensity of VIII (Severe). The shock was located in the area between Olympia and Tacoma, and was felt throughout the state, as well as parts of Oregon, British Columbia, Idaho, and Montana. It is the largest recorded earthquake to occur in the Puget Sound region of Washington. Eight people were killed and many were injured.
See also
References
- 1 2 3 4 ISC (2014), ISC-GEM Global Instrumental Earthquake Catalogue (1900-2009), Version 1.05, International Seismological Centre
- 1 2 Baker, G. E.; Langston, C. A. (1987), "Source parameters of the 1949 magnitude 7.1 south Puget Sound, Washington, earthquake as determined from long-period body waves and strong ground motions", Bulletin of the Seismological Society of America (Seismological Society of America) 77 (5): 1546
- 1 2 3 4 Stover, C. W.; Coffman, J. L. (1993), Seismicity of the United States, 1568-1989 (Revised), U.S. Geological Survey Professional Paper 1527, United States Government Printing Office, pp. 380, 385, 386
- Sources
- Ichinose, G. A.; Thio, H. K.; Somerville, P. G. (2006), "Moment Tensor and Rupture Model for the 1949 Olympia, Washington, Earthquake and Scaling Relations for Cascadia and Global Intraslab Earthquakes", Bulletin of the Seismological Society of America (Seismological Society of America) 96 (3): 1029–1037, doi:10.1785/0120050132
External links
- Historic Earthquakes – United States Geological Survey
- Earthquake hits Puget Sound area on April 13, 1949 – HistoryLink
- Earthquakes in Washington – Washington Department of Natural Resources
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