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A magnitude-9.0 earthquake would result in a tsunami that would reach Puget Sound. What comes after the Big One? Even after the Big One is done, aftershocks should be expected, Bodin said.
The 1949 Olympia earthquake was a damaging magnitude 6.7 intraslab earthquake that occurred at 52 km depth and caused eight deaths. Another notable intraslab earthquake in the Puget Sound region was the magnitude 6.8 2001 Nisqually earthquake. Intraslab earthquakes in Cascadia occur in areas where the subducting plate has high curvature. [13]
The most important clue linking the tsunami in Japan and the earthquake in the Pacific Northwest comes from studies of tree rings (dendrochronology), which show that several "ghost forests" of red cedar trees in Oregon and Washington, killed by lowering of coastal forests into the tidal zone by the earthquake, have outermost growth rings that formed in 1699, the last growing season before the ...
The Tacoma Fault Zone marks the south end of the Seattle Uplift, of which the similar and related Seattle Fault Zone marks the north end. This uplift is believed to be either a slab of rock about 15 km thick being pushed up a ramp, or a wedge being popped up between these two faults, by tectonic forces from the south or south-west as tectonic plates riding on top of the Juan de Fuca plate are ...
The chances for a 6.0 magnitude or greater earthquake to occur along the Seattle Fault within the next 30 years is 80-85%, according to one seismologist.
Scenario for a Magnitude 6.7 Earthquake on the Seattle Fault Vivid and comprehensive. Washington State's Bridge Seismic Retrofit Program; Earthquake Study: Four Vashon-Specific Scenarios Considerations for all islands. Puget Sound Tsunami Inundation Modeling (NOAA) Elliott Bay inundation map (DNR) Tsunami Hazard Map of the Elliott Bay Area (NOAA)
French prognosticator Nostradamus predicted an epic earthquake would rock the earth on Thursday, but the world appears to have escaped relatively unscathed. Approximately 500 years ago ...
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.