The 45th anniversary of the catastrophic eruption of Mount St. Helens is on May 18. Here's what to know and when the volcano might erupt again.

Mount Spurr, located west of Anchorage, Alaska, is showing signs of an imminent eruption, with over 100 earthquakes detected ...

A major U.S. city is under threat from a potential volcanic eruption after more than 20 earthquakes were recorded in Alaska.

An explosion on Mount Spurr could generate massive cloud of ash, which could mess with airplanes and cause issues for humans.

Congressman Nick Begich (AK-R) introduced legislation to reauthorize the National Volcano Early Warning and Monitoring System ...