Volcanoes are considered active if they have erupted sometime ... refer to volcanoes that haven't erupted in a long time as "dormant," but there's no scientific definition of that word.

Volcanoes offer breath-taking views and thrilling adventures. Explore Iceland’s Thrihnukagigur magma chamber, Costa Rica’s ...

Beneath dormant volcanoes in the Cascades region of the Pacific Northwest, scientists found large reservoirs of magma. The discovery challenges the belief that active volcanoes have large magma ...

Amid U.S. threats against Iran, the unveiling of the IRGC’s missile city located 500 meters underground has garnered ...

Scientists say Mount Spurr — about 80 miles from Anchorage — is becoming more seismically active, spewing large amounts of dangerous gasses and heating up at its surface.

Monitoring stations around Mount Adams noted nine earthquakes ranging from magnitude 0.9 to 2.0 near the volcano between ...