Magma from the mantle finds its way to the surface, where it erupts as lava or ash and gas—sometimes in spectacular spurts, ...

Widely shared social media posts claimed a massive underwater volcano "the size of a city" was "showing signs it could erupt ...

A seismologist from Seattle discussed recent volcanic activity across the United States. Here's what you should know.

The U.S. Geological Survey Cascades Volcano Observatory posts a weekly volcanic activity update in the Pacific Northwest. The big five volcanoes in Washington are detailed, as well as Mount Hood ...

The Pacific Northwest Seismic Network recorded hundreds of small earthquakes at Mt. Rainier on Tuesday morning. The US ...

Back in 2005, the U.S. Geological Survey set out to determine just that, assigning a “threat level” to all 169 potentially active volcanoes in the United States.

The Pacific Northwest has a long history of volcanoes, and 42 years after the Mount St. Helens eruption, we still are learning more about the active volcanoes. Skip Navigation Share on Facebook ...

An undersea volcano off Oregon’s coast will likely erupt in 2025, scientists say. Known as Axial Seamount, it’s the most active volcano in the Pacific Northwest — though one most people ...

The Pacific Northwest peaks are among a dozen in the U.S. that have increased in danger since 2005. Number one on the list is Hawaii's Kilauea, which has been active and erupting since 1983 ...

Don’t be too hard on yourself if you’ve never heard of the Northwest’s most active volcano. It has no national park or ski area named after it. Its heights grace no city’s skyline. The ...

The most active volcano in the Pacific Northwest is the Axial Seamount. It’s located 300 miles west of Astoria, Oregon, and a mile under the ocean. It’s erupted three times in the past 25 years.