Videos

Close view of lava spilling over the lip of Wilipe`a sea cliff.

Close view of wave crashing over lava in the surf zone.

Lava spills over Wilipe`a sea cliff and across boulders into the sea.

Lava cascades down sea cliff on July 19, 2002, 3.5 hours after Mother's Day flow reached to the sea.

A`a lava flow on 23 February

USGS scientists C. Dan Miller, Don Mullineaux, Mike Doukas, Norm Banks, Don Swanson, and Richard Waitt talk about their experiences at Mount St.

A USGS scientist walks along a lava flow from the April 2, 1984 Mauna Loa eruption. The scientist stops to observe a standing wave of lava at the end. The lava flow is moving at 64 km/hr (40 mph) towards Hilo, Hawai'i. 
 

Mount St. Helens erupted catastrophically on May 18, 1980 beginning at 8:32 a.m. USGS geologist Don Swanson photographed and filmed the eruption from about 9:30 a.m. to 12:30 p.m., documenting the rising ash column and ground-hugging pyroclastic density currents.

Eruptive activity at Mount St. Helens captured the world’s attention on May 18, 1980 when the largest historical landslide on Earth and a powerful explosion reshaped the volcano. A volcanic ash cloud spread across the US in 3 days, and encircled the Earth in 15 days.

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