Mount Spurr is not the kind of lava-spewing volcano familiar from Hawaii, but instead has historically ejected huge plumes of ...

Scientists have raised concerns after the alert levels for three U.S. volcanoes were upgraded due to increased activity. The ...

Researchers found that magma chambers beneath Cascade Range volcanoes persist even when the volcanoes are dormant, ...

Scientists are keeping a close eye on three US volcanoes after their threat levels rose Thursday, suggesting eruptions may be ...