• Axial Seamount is the best-monitored submarine volcano in the world. • It’s the most active undersea volcano closest to California. • It could erupt by the end of the year. A mysterious and highly ...

More than a century has passed since the last eruptions of Mount Lassen and Mount Shasta, yet both remain active and ...

A mysterious and highly active undersea volcano off the Pacific Coast could erupt by the end of this year, scientists say. Nearly a mile deep and about 700 miles northwest of San Francisco, the ...

Smoke billows from the mouth of Mt. Shasta like a thunderous cough. Within moments, clear skies turn gray, and the sun vanishes behind thick, shifting layers of volcanic gas and ash. Visitors snap ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. An underwater volcano off the Pacific Coast ...

The tiny Mojave Desert outpost of Amboy has seen a lot of change over the past 50 years or so. First, Route 66 was bypassed by Interstate 40, directing travelers away from the businesses that had ...

A mysterious and highly active undersea volcano off the Pacific Coast could erupt by the end of this year, scientists say. Nearly a mile deep and about 700 miles northwest of San Francisco, the ...

California has seven active volcanoes, each with a unique eruption history, categorized by type and threat level. The USGS monitors these volcanoes, providing information to authorities and the public ...