A gigantic bulge in the north rim of the Yellowstone caldera is the latest sign of volcanic activity in the national park.

Scientists are monitoring a city of Chicago-sized swath of rising ground at the northern volcanic rim of the Yellowstone ...

Learn more about the past eruptions at Yellowstone National Park and how each new eruption displaced evidence of the past.

This eerie astronaut photo shows a ghostly structure with a skull-like appearance glowering up into space from the floor of a giant volcanic pit in the Sahara. The cranium lookalike is located on the ...

Caldera volcanic eruptions create geological hazards that affect many communities around the world. Geophysical, geochemical and remote sensing data have become essential for understanding the tectono ...

Much of America's diverse and epic landscape comes courtesy of volcanic activity. Many of the most iconic natural wonders in the United States, particularly on the West Coast, were formed from ...

BEND, Oregon — There's no better way to celebrate summer than packing up and moving out for a camping trip at the Newberry National Volcanic Monument near Bend, a historic hotbed of volcanic eruptions ...