Scientists Stumped by Oregon Quakes

Rumbling of 600 quakes in 10 days caught by underwater microphones
By Rob Quinn,  Newser Staff
Posted Apr 12, 2008 7:33 AM CDT
The quakes have so far been too small and too far offshore to cause any damage on land, although some Oregonians are reported to have felt them.   (Magnum Photos)
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(Newser) – A swarm of more than 600 earthquakes off the Oregon coast has scientists stumped, the Oregonian reports. The activity started around 10 days ago and a research ship has been diverted to the area to look for answers. The earthquakes resemble those that happen before a volcano erupts but there are none in the area, around 150 miles off central Oregon. Three of the earthquakes have been over magnitude 5 on the Richter scale.