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Earthquakes at Mount Hood, February 2012.

Earthquakes at Mount Hood, February 2012.

Typically, several earthquake swarms occur each year at Mount Hood, with some lasting for hours, others lasting for days to weeks.

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Volcano Watch — The Montserrat dome

Volcano Watch — The Montserrat dome

Last Thursday, scientists at HVO's sister observatory in Vancouver, Washington (the USGS Cascades Volcano Observatory, or CVO) received a distress...

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Volcano Watch — The three U.S. Volcano Observatories

Volcano Watch — The three U.S. Volcano Observatories

The U.S. Geological Survey's Volcano Hazards Program funds the operations of three volcano observatories in the United States. They are the Hawaiian...

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