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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 Puget Sound faults under the heavily populated Puget Sound region (Puget Lowland) of Washington state form a regional complex of interrelated seismogenic (earthquake-causing) geologic faults. These include (from north to south, see map) the: Devils Mountain Fault; Strawberry Point and Utsalady Point faults; Southern Whidbey Island Fault (SWIF)
M I (Johnston, 1996) Believed to be the largest earthquake ever to strike the east coast. USGS February 23, 1887 06:30 local time Liguria, Italy. 1887 Liguria earthquake. 43.78 8.07 600–3,000 6.3–7.5 M w The earthquake caused severe damage along the Ligurian coast and caused the town of Bussana Vecchia to be abandoned. [141] [142] September ...
The Great Colchester Earthquake; The effects of the earthquake on the area of Eastern Essex south of the River Blackwater Archived 20 November 2008 at the Wayback Machine; Meldola, Raphael; White, William (1885). Report on the East Anglian Earthquake of April 22nd, 1884. Essex Field Club Special Memoirs. Vol. 1. London: Macmiillan & Co.
WA state has the second-highest risk of large earthquakes in the U.S., according to the Washington Department of Natural Resources.
Nearly 75% of the country is at risk for a potentially damaging earthquake in the next 100 years, according to a recently updated map from the U.S. Geological Survey.
A 2002 study of bridge vulnerability estimated that a magnitude 7 earthquake on the Seattle Fault would damage approximately 80 bridges in the Seattle–Tacoma area, [30] whereas a magnitude 9 subduction event would damage only around 87 bridges in all of Western Washington. [31]
A fault off the Pacific coast could devastate Washington, Oregon and Northern California with a major earthquake and tsunami. Researchers mapped it comprehensively for the first time.