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12 Apr 11 - A magnitude-4.3 earthquake struck off the Oregon coast this morning, almost exactly three years after an unusual swarm of 600 earthquakes struck near the same area. Three years ago, on April 14, 2008, scientists at Oregon State University’s Hatfield Marine Science Center announced that they had recorded more than 600 earthquakes off the central Oregon coast in just 10 days. This earthquake “swarm” was unique, said OSU marine geologist Robert Dziak, because it occurred in the middle of the Juan de Fuca plate – away from the major, regional tectonic boundaries and in an area not typically known for a high degree of seismic activity. At least three of the earthquakes were magnitude of 5.0 or higher, Dziak said, which was also unusual. The earthquakes were located about 150 nautical miles southwest of Newport, Oregon. Today's earthquake:
Earthquake data courtesy of
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