United States Geological Survey scientists have shared maps that show where ash would fall across the US if a Yellowstone ...

Under California's Sierra Nevada mountains, a slow yet powerful force will change the entirety of the Earth's crust there.

From HIV services to volcano monitoring, the loss of USAID funding is putting millions of lives at risk around the world, as ...

One of the largest active volcanoes has been rocked by a series of earthquakes, putting experts on high alert and prompting ...

Preliminary 2.6-magnitude and 2.5-magnitude earthquakes shook the East Bay early Wednesday morning, according to the U.S.