Unusual Earthquakes Measured Off Oregon

(AP) -- Scientists listening to underwater microphones have detected an unusual swarm of earthquakes off central Oregon, something that often happens before a volcanic eruption - except there are no volcanoes in the area.

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<p><a href="http://www.physorg.com/news127238826.html">Unusual Earthquakes Measured Off Oregon</a></p> <p>(AP) -- Scientists listening to underwater microphones have detected an unusual swarm of earthquakes off central Oregon, something that often happens before a volcanic eruption - except there are no volcanoes in the area.</p>