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What would a 9.0 earthquake mean for the area? Big One-related research efforts made national headlines this summer, including in The Washington Post.NBC News recently reported that between the ...
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 ...
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 ]
Extrapolation from the Parkfield earthquakes of 1857, 1881, 1901, 1922, 1934, and 1966 led to a forecast of an earthquake around 1988, or before 1993 at the latest (at the 95% confidence interval), based on the characteristic earthquake model. [12] Instrumentation was put in place in hopes of detecting precursors of the anticipated earthquake.
Word of the forecast spread around the world, with people overseas reporting on the tragedy-to-be -- but Californians remained disaster-free. LA Weekly spoke to a seismologist who says 9.8 wouldn ...
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.
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 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]