A pair of moderate earthquakes that shook Northern California on Thursday and Friday happened near a region known as the Almanor Fault Zone, marking the two strongest temblors in almost a decade for a ...

While it is often said that mountains don’t move, in reality, the Colorado Rocky Mountains are the result of a slow dance that has been occurring beneath the earth’s surface for hundreds of millions ...

First things first – everything is normal. Mount Rainier is not about to erupt. Today, at least. (The future is another story.) Got it? OK, good. Now that that’s out of the way, the Cascades Volcano ...

NAPA, Calif. (KGO) -- Bigger and stronger than first thought. Scientists uncover new findings about the fault line that caused the 6.0 earthquake in Napa nearly a decade ago. The earthquake in 2014 ...

An earthquake swarm centered under Yellowstone Lake is shaking Yellowstone National Park, USGS said. NPS/Neal Herbert A swarm of more than 141 earthquakes is rattling Yellowstone National Park, ...