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The 1965 Puget Sound earthquake occurred at 08:28 AM PDT (15:28 UTC) on April 29 within the Puget Sound region of Washington state. It had a magnitude of 6.7 on the moment magnitude scale and a maximum perceived intensity of VIII (Severe) on the Mercalli intensity scale. It caused the deaths of seven people and about $12.5–28 million in damage.
The movement was the equivalent of a 6.7 magnitude earthquake. [21] The motion did not trigger an earthquake and was only detectable as silent, non-earthquake seismic signatures. [22] In 2004, a study conducted by the Geological Society of America analyzed the potential for land subsidence along the Cascadia subduction zone.
The "Parkfield earthquake prediction experiment" was the most heralded scientific earthquake prediction ever. [ 186 ] [ t ] It was based on an observation that the Parkfield segment of the San Andreas Fault [ u ] breaks regularly with a moderate earthquake of about M 6 every several decades: 1857, 1881, 1901, 1922, 1934, and 1966. [ 187 ]
The epicenter was in the southern Puget Sound, northeast of Olympia, but the shock was felt in Oregon, British Columbia, eastern Washington, and Idaho. [6] This was the most recent of several large earthquakes that occurred in the Puget Sound region over a 52-year period and caused property damage valued at $1–4 billion.
The prospect of a major earthquake on the Doty Fault poses a serious hazard to the entire Puget Sound region as it threatens vital economic lifelines: At Chehalis there is but a single freeway (Interstate 5) and a single rail line connecting the Puget Sound region with the rest of the west coast; the only alternate routes are very lengthy. [186]
Minneapolis-St. Paul expected snowfall A National Weather Service graphic showing the predicted snowfall near Minneapolis-St. Paul through 6 p.m. CT on Friday, December 19. Bismarck expected snowfall
It is an aftershock of the 2001 Gujarat earthquake. Additional damage was caused, and 40 people were injured. A strong magnitude 6.6 struck El Salvador, on February 13 at a depth of 10.0 km (6.2 mi). 315 people were killed. [19] A magnitude 7.4 struck Sumatra, Indonesia, on February 13 at a depth of 36.0 km (22.4 mi). [20]
The 1949 Olympia earthquake occurred on April 13 at 11:55:44 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 .