Volcano

Mount St. Helens
4:51 pm
Wed April 30, 2014

Magma Rising Beneath Mount St. Helens, But No Eruption Imminent

File photo of Mount St. Helens
Credit Wes Peck/Flickr

Scientists monitoring Mount St. Helens confirmed Wednesday that magma is on the rise and "re-pressurizing" the volcano in southwest Washington. However, they also stress there are no signs of an imminent eruption. 

Scientists keep tabs on Mount St. Helens with seismometers and very sensitive GPS instruments. Earthquake activity is still low. The GPS stations are more revealing. They show the volcano swelling modestly.

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Magma Research
7:47 am
Mon February 17, 2014

Volcanic Eruptions Could Be More Rare Than You Think

Researchers studying Mount Hood have found that magma is often too cold to move around so much.
Credit Greg Harness/Flickr

Right before a volcano erupts, molten rock, known as magma, is moving around underneath the surface. New research suggests this liquid magma is very rare. That’s an important finding for researchers trying to predict when a volcano may erupt.

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Lahars Warning
6:22 am
Fri September 20, 2013

Colombians Urge Pacific Northwesterners To Appreciate Lahar Danger

Armero, Colombia was destroyed by a lahar on November 13, 1985. More than 23,000 people were killed when lahars (volcanic debris flows) swept down from the erupting Nevado del Ruiz volcano.
Credit R.J. Janda

Visiting scientists from the country of Colombia have a warning for people living in the valleys below our Northwest volcanoes. Get educated about a rare but dangerous phenomenon called a "lahar."

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Undersea Volcano
6:45 am
Mon June 11, 2012

Caught On Tape! Undersea Volcano Erupts Off Northwest Coast

Hydrophone deployed at Axial Seamount.
Photo by Bill Chadwick OSU

For the first time, we're getting to listen to the eruption of an undersea volcano off the Northwest coast. Correspondent Tom Banse got a hold of unusual recordings made at a place called Axial Seamount. It's about 300 miles out to sea from Cannon Beach, Oregon.

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Volcano Research
7:09 am
Wed February 15, 2012

Why Mt. Hood Never Erupts With A Bang

Mt. Hood erupts less explosively than other Cascade mountains.
Photo credit Wikimedia Commons

MT. HOOD, Ore. -- Researchers at Oregon State University think they have figured out why Mt. Hood doesn’t erupt with the same bang and violence as other Cascade volcanoes. Amelia Templeton reports.

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