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

The 1980 Mount St. Helens eruption began with a steady series of earthquakes in March. By April it began spewing smoke, ...

Axial Seamount, a major US volcano is set to erupt imminently. But what impact will the volcano eruption have on the surround ...

An underwater volcano near the US coast, named Axial Seamount is showing signs of activity that suggest it might erupt ...

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

For a pilot, the first signs of flying into an ash cloud can include sudden darkness, fluctuating airspeed, and landing ...

They tend to inflate like a balloon in between eruptions. At Axial, the sea floor is actually rising, and that’s a big signal.” ...

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

The most active volcano in the Pacific Northwest could erupt 'any day now,' scientists have warned. The Axial Seamount is a ...

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

One of the Pacific Ocean’s lesser-known volcanoes will blow its vent in the coming months, causing 10,000 earthquakes in one day. Here’s what scientists are saying.

The May 18, 1980, eruption ... have a threat level of either "very high" or "high," according to the 2018 USGS hazard assessment report. How many active volcanoes are there in the US?