The Mount St. Helens eruption anniversary prompts investigation into the California earthquakes: eruption history, threat levels.

A major earthquake hasn't struck any of California's biggest cities in more than three decades, but the "Big One" is a matter ...

Wendy Bohon from the California Geological Survey advises that during an earthquake, individuals should drop to the ground, take cover under sturdy furniture, and hold on until the shaking stops. This ...

A camera captured the eruption of the Klyuchevskaya Sopka volcano. A massive magnitude 8.8 earthquake struck off Russia's Pacific coast, triggering tsunami warnings and evacuations of coastal areas in ...

California’s volcanic giants are hard to miss. Mount Shasta looms over the Oregon border. Lassen Peak, the southernmost active volcano in the Cascade Range, erupted just over a century ago, blasting ...

WELLINGTON, New Zealand -- An underwater volcano in the South Pacific erupted violently on Saturday, causing tsunamis to hit Hawaii, Japan, and Tonga's largest island, Tongatapu -- sending waves ...

A massive magnitude 8.8 earthquake struck off Russia's Pacific coast, triggering tsunami warnings and evacuations of coastal areas in Hawaii and alerts along the United States' West Coast. The intense ...

(LOS ANGELES) -- A massive magnitude 8.8 earthquake struck off Russia's Pacific coast, sparking tsunami warnings and evacuations of coastal areas in Hawaii and alerts along the U.S. West Coast. In ...