1949 Olympia earthquake
|Date||April 13, 1949|
|Origin time||19:55:44 UTC |
|Duration||~ 20 s |
|Magnitude||6.7 Mw |
|Depth||50 km (31 mi) |
|Areas affected||Puget Sound region
|Total damage||$25 million |
|Max. intensity||VIII (Severe) |
|Peak acceleration||.25g |
|Casualties||8 killed 
Many injured 
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.
Damage in Olympia from the earthquake was estimated between $500,000 and $1 million by Governor Arthur B. Langlie. Eight buildings on the State Capital campus were damaged by the earthquake, as well as the Old Capitol Building in downtown Olympia.
Total damage from the earthquake are estimated at $25 million.
- List of earthquakes in 1949
- List of earthquakes in the United States
- List of earthquakes in Washington (state)
- Marvin Klegman
- ISC (2014), ISC-GEM Global Instrumental Earthquake Catalogue (1900–2009), Version 1.05, International Seismological Centre
- 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
- 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
- "Olympia Damage Half Million, Says Langlie". The Seattle Daily Times. April 19, 1949. p. 7.
- "Earthquake Listed as Major; 5 Dead; Damage in Millions". The Seattle Daily Times. April 13, 1949. p. 1.
- 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
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