Echinus Geyser in Yellowstone National Park, a rare acidic geyser and the largest in the world, has recently been observed ...

Learn more about the Echinus Geyser at Yellowstone Park, which recently erupted, but may not sustain into the summer.

The Kīlauea volcano has erupted 14 times since December on the Island of Hawai'i, geologists say.

Yellowstone’s massive supervolcano and Mount St. Helens, the volcano that devastated Washington in 1980, are among America’s most infamous natural threats. This video explores what makes each one so ...

HONOLULU (AP) — Hawaii’s Mauna Loa, the world’s largest active volcano, has started to erupt, prompting volcanic ash and debris to fall nearby, authorities said Monday. The eruption began late Sunday ...

Far beneath the forests and hot springs of the American West, the continent’s largest active volcanic system is rumbling in ways scientists are only now beginning to fully resolve. New seismic ...

New seismic activity beneath Mount Teide is being monitored by scientists, with no immediate eruption risk for Tenerife.

When you think of the United States, images of sprawling cities and vast landscapes might come to mind, but not the hidden and ever-present geological threat: volcanoes. While you might associate ...