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The 1993 Scotts Mills earthquake, also known as the "Spring break quake", occurred in the U.S. state of Oregon on March 25 at 5:34 AM Pacific Standard Time. With a moment magnitude of 5.6 and a maximum perceived intensity of VII ( Very strong ) on the Mercalli intensity scale , it was the largest earthquake in the Pacific Northwest since the ...
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] Much of the seismicity that occurs off the coast of northern California is due to intraplate deformation within the Gorda plate.
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 ...
A 6.1 magnitude earthquake occurred approximately 173 miles off the coast of Bandon, Ore. at approximately 1:15 p.m. Wednesday, according to the U.S. Geological Survey.
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.
Why does Oregon practice earthquake drills? Based on past findings, scientists project that another large Cascadia quake is imminent. "We expect that sometime, possibly in our lifetime, there will ...
The 2001 Nisqually earthquake occurred at 10:54:32 local time on February 28, 2001, and lasted nearly a minute. [5] The intraslab earthquake had a moment magnitude of 6.8 and a maximum Mercalli intensity of VIII ( Severe ).
Aug. 1—The United States Geological Survey (USGS) reports a 4.0 magnitude earthquake occurred off the Oregon Cast near Port Orford at about 12:30 p.m. Tuesday, Aug. 1. This is the second such ...