The volcanic system beneath Yellowstone National Park is one of the few places on Earth capable of an eruption so large it could smother much of the United States in ash and disrupt life across the ...

A gigantic bulge in the north rim of the Yellowstone caldera is the latest sign of volcanic activity in the national park. Geologists call this type of bulge “volcanic uplift.” It’s often caused by ...

Yellowstone National Park sits atop one of the most studied volcanic systems on Earth, and the question of what a full-scale caldera-forming eruption would do to the United States draws enormous ...