Inferno Cone, Spatter Cones, Devils Orchard, and the Caves Area all have their own pull-offs, so you can cruise at your own ...

You don’t have to go to Hawaii, the Pacific Northwest or Central America to hike a volcano. Just head north to Flagstaff. "Almost every hill out here is a volcano," says Bob Van Belle, a National Park ...

Black cinder, at top, is highly porous small hard bits expelled by fountaining lava without much exposure to oxygen before cooling. Hawaii’s commercial supply of the material is nearing depletion ...

Lassen Peak, shown here, is the southernmost active volcano in the Cascade Mountain Range of western North America, extending from southern British Columbia to northern California. This vast range is ...

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

A tuya! Click on the image to see a larger version. Image by Erik Klemetti. Alright, well, that doesn't entirely help, does it? Lets look at the feature the arrow indicates. Some observations: (1) It ...

HONOLULU — The eruption of the Mauna Loa volcano on Hawaii's Big Island continues to ease, scientists said Sunday, reinforcing an earlier pronouncement that the mountain's first flare-up in nearly 40 ...

Editor’s note • This article is part of 150 Things To Do, a reporting project and newsletter exploring the best that Utah has to offer. Click here to sign up for the 150 Things weekly newsletter. The ...