Mount Shasta, a steep-sided Cascade Range stratovolcano in Northern California, looms above Little Glass Mountain, a thick obsidian flow erupted from the Medicine Lake shield volcano about 1,000 years ...

Plans are underway to implement a new volcano monitoring system across the United States. The radar-based system, called VolcSARvatory, was developed in a joint effort by the University of Alaska ...

The Bárðarbunga volcano system was responsible for Iceland's largest eruption for 300 years back in 2014. After a recent increase in seismic activity, could it be about to erupt again? When you ...

Mount Rainier’s quiet, snowcapped profile hides a restless interior that has just rattled itself with more than a thousand tiny earthquakes, a reminder that one of the country’s most dangerous ...