News

The journey from volcanic repose to a climactic eruption is like a mystery movie that keeps you at the edge of your seat. The story is filled with...

The combination of a continuous MultiGAS station within Mount St. Helens' crater and the new scanning DOAS represents state-of-the-art in geochemical...

You are invited to a public lecture about the 1980 Mount St. Helens eruptions.

Earthquake swarms are common at Yellowstone, but why do they occur?  Are they driven by magma migration?  Water?  Steady creep along faults?  All...

The U.S. Geological Survey's Hawaiian Volcano Observatory (HVO) recorded a magnitude-4.5 earthquake located beneath the south part of the Island of...

The night sky over Kīlauea summit lit up with the glow of lava Sunday, December 20th, 2020. Deep in the caldera, the gathered lake water was boiled by...

Kīlauea's summit is no longer erupting; lava supply to the Halemaʻumaʻu lava lake has ceased and sulfur dioxide emissions have decreased to near pre...

Visitors to Mammoth Hot Springs in Yellowstone National Park might have noticed an odd geological feature near the top of Mount Everts—an unconformity...

Normal faulting? No change in volcanic hazard? Cascades Volcano Observatory geophysicists describe how they interpret earthquake data using the June 5...

Kīlauea's summit is no longer erupting; lava supply to the Halemaʻumaʻu lava lake has ceased and sulfur dioxide emissions have decreased to near pre...