Add Yahoo as a preferred source to see more of our stories on Google. Image of active volcano shows magma pressure inside volcanoes can destabilize slopes and trigger collapse. (CREDIT: YouTube / CC ...

Emily Schwing: In 1912 a volcano in Alaska more than blew its top. Known as Novarupta, it was responsible for the most powerful volcanic eruption of the 20th century. Kristi Wallace: The reason we ...

Introduction -- Global distribution of active volcanoes / Elizabeth Cottrell -- Basaltic lava flow hazard / Andrew J. L. Harris -- Impacts from volanic ash fall / Thomas M. Wilson, Susanna Jenkins, ...

Spanish and French researchers have defined the age, location, size and geochemistry of the volcanoes of Gran Canaria during the Holocene, 11,000 years ago, in order to draw up a map of volcanic ...

April 9 (UPI) --Large volcanic eruptions can trigger the formation of superheated gas-and-ash clouds. These pyroclastic density currents, or pyroclastic flows, are the most lethal volcanic threat.

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 ...

LOS ANGELES (AP) — 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 ...

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.

One of two main craters on Alaska’s Mount Spurr, shown in 1991. Earthquake activity suggests the volcano is close to erupting again in 2025. (Photo by R.G. McGimsey/Alaska Volcano Observatory/U.S.