Washington volcanoes

NEWPORT, Ore. - 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.

Researchers from Oregon State University deployed instruments on the seafloor in anticipation of an eruption at Axial Seamount last year. At first, an underwater microphone - called a hydrophone - captured the low-frequency rumblings of small earthquakes. The sped up audio sounds like a loud bump.

“It’s not a question of if, but when, the next volcanic event will occur”

When it blows, Mount Rainier might produce “Lahar,” or volcanic mudflow, that could cause property losses of up to $6 billion in the Puyallup Valley, a new study by the Washington State Department of Natural Resources shows.