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News about Mount Hood.

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Recent Mount Hood earthquake swarm typical for this Oregon volcano.

Recent Mount Hood earthquake swarm typical for this Oregon volcano.

At Mount Hood, a swarm of small earthquakes was detected May 15-16, 2016. Studies of past swarms have concluded that they likely are occurring on pre...

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Small debris flows observed in the White River drainage on Mount Hood.

Small debris flows observed in the White River drainage on Mount Hood.

USGS-Cascades Volcano Observatory geologists working in the area on August 21 observed higher sediment-laden stream flows and broad areas adjacent to...

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Small seismic swarm at Mount Hood, August 18, 2012.

Small seismic swarm at Mount Hood, August 18, 2012.

Such small swarms are not uncommon at Hood, with the most recent occurring December 11, 2011, and are considered by CVO and the PNSN to be part of the...

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April 8, 2012, earthquake swarm ~20 km south of Mount Hood

April 8, 2012, earthquake swarm ~20 km south of Mount Hood

The swarm is consistent with a tectonic, rather than magmatic, origin.

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Earthquake swarm at Mount Hood

Earthquake swarm at Mount Hood

Starting at approximately 22:00 pm PST on March 7, 2012, a small swarm of earthquakes has been occurring near Mount Hood.

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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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