Fortunately for residents of California, Oregon and Washington, Axial Seamount doesn't erupt explosively, so it poses zero ...

Axial Seamount, a volcano hundreds of miles off the coast of Oregon, may be a problem in the near future. This underwater ...

A massive underwater volcano, Axial Seamount, 300 miles off Oregon’s coast, may erupt soon after over 1,000 daily quakes and ...

Over the Sierra crest — about 150 miles to the east of Manteca, Oakdale, and Turlock — is one of the world’s largest active ...

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

Mount St. Helens, the largest volcanic eruption in US history, was commemorated this weekend, 45 years after its eruption, ...

According to the USGS, Mount St. Helens is the most active volcano in the lower 48 states and the most likely in the Cascades to erupt again.

At 8:32 a.m. on May 18, a magnitude 5.1 earthquake centered below the mountain triggered one of the largest landslides ... ago and has been the most active volcano in the Cascade Range.