Volcanoes are grouped into four types: cinder cones, composite volcanoes, shield volcanoes and lava volcanoes. Cinder cones are circular or oval cones made up of small fragments of lava from a single ...

They're born. They live once, erupting for a period that might last for days, years or decades. Then, they go dark and die. This narrative describes the life of a monogenetic volcano, a type of ...

Nearly 200,000 people live, work or pass through California’s volcanic hazard zones on a daily basis, researchers said Monday in a report broadly assessing what could be at risk from an eruption. The ...

The U.S. Geological Survey (USGS) has warned that California's next big hazard could come in the form of a volcanic eruption—not a massive earthquake, landslide or wildfire, which the state is often ...

If Glacier Peak were to wake up tomorrow and start rumbling, it would be hard for scientists to tell. The National Volcanic Early Warning and Monitoring Systems Act, passed in February, sets out to ...

Nearly 200,000 people live, work or pass through one of California's volcanic hazard zones on a daily basis, and there's a 16 percent chance of an eruption in the state within the next 30 years.

This chapter summarizes the principal conclusions and recommendations developed elsewhere in this report. Major conclusions are printed in italics and recommendations in bold. Basic research in the ...

Hawaii Island’s Kīlauea Volcano erupted for the 43rd time on March 10, issuing a rare Ashfall Warning. This isn't the first ...