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Note: The inclusion criteria for adding events are based on WikiProject Earthquakes' notability guideline that was developed for stand-alone articles. The principles described also apply to lists. In summary, only damaging, injurious, or deadly events should be recorded.
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 1872 North Cascades earthquake occurred at 9:40 p.m. local time on December 14 in central Washington Territory (now Washington state).A maximum Mercalli intensity of VIII (Severe) was assessed for several locations, though less intense shaking was observed at many other locations in Washington, Oregon, and British Columbia.
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Of particular concern are signals of massive earthquakes in the region’s geologic history. Many researchers have chased clues of the last “big one”: an 8.7-magnitude earthquake in 1700.
Damaging earthquakes are well known in the Pacific Northwest, including several larger than magnitude 7, most notably the M9 1700 Cascadia earthquake and the M7.0–7.3 earthquake in about 900AD on the Seattle Fault. The M6.5 1965 Puget Sound earthquake shook the Seattle, Washington, area, causing substantial damage and seven deaths. This event ...
WA state has the second-highest risk of large earthquakes in the U.S., according to the Washington Department of Natural Resources.
1935 Helena earthquake: July 15, 1936: Oregon, Washington: 5.8 M L 0: 1936 State Line earthquake: July 22, 1937: Alaska 7.3 M s 0 1937 Alaska earthquake [2] November 10, 1938: Alaska 8.2 M w 0 [8] May 18, 1940: California: 6.9 M w 9: 1940 El Centro earthquake: December 20, 1940: New Hampshire: 5.3 M w 0: 1940 New Hampshire earthquakes: December ...