Scientists have identified the “mystery volcano” that erupted in 1831 and cooled Earth’s climate. They have linked it to an island volcano in the northwest Pacific Ocean.

The Pacific Northwest's most active volcano could erupt this year, experts predict, though few people are likely to notice. Why it matters: The Axial Seamount — about 300 miles west of Astoria and a mile beneath the ocean — is far enough offshore that it poses little risk to people,

Geologists found a deep-running network of magma channels in the northeast corner of Yellowstone National Park.

Experts warn of the imminent risk of a massive volcano eruption that could cool the planet, affect crops, and trigger a global crisis.

Axial Seamount off Oregon's coast is the most active volcano in the Pacific Northwest, about 300 miles offshore and just under a mile beneath the ocean waves.

One of the most active volcanoes in the Pacific Northwest is waking up — leading some scientists to believe it will erupt in 2025.