The Yellowstone Caldera, spanning Wyoming, Idaho, and Montana, is among the most seismically active volcanic regions on Earth ...

Yellowstone, a popular tourist destination and namesake of an equally popular TV show, was the first-ever national park in ...

A slew of earthquakes shook up the Salton Sea region of Southern California within 24 hours over the weekend, with the seismic activity reaching up to 4.5 in magnitude. The first swarm began at 12 ...

Beginning Monday, parts of California were hit with an earthquake swarm that has scientists concerned that a larger-scale quake could be on its way. As of Tuesday, the largest earthquake in the ...

An earthquake swarm of four small temblors rattled areas around a reservoir in Northern California on Tuesday, the second time in three days that multiples quakes struck the area. The USGS said a ...

California was hit by three earthquakes on Wednesday, just days after a major 5.2 magnitude quake rocked the state. The US Geological Survey (USGS) detected a 3.8 magnitude earthquake around 8am ...

The last major earthquake in California was 1994’s Northridge earthquake, which affected Los Angeles and the surrounding areas. The 6.7 magnitude earthquake caused $25 billion in damage, killed ...

A swarm of hundreds of earthquakes near the Salton Sea in Southern California has a slim chance of triggering a major quake in the area, but not of setting off the San Andreas Fault, experts say.

More than 200 small earthquakes peppered California's Imperial Valley on Wednesday night and Thursday morning. The USGS reports that 240 small earthquakes occurred near Westmorland, California ...

A magnitude-4.6 earthquake that rattled Southern California on Friday night was the strongest in another swarm of quakes reported in the Salton Sea area. The quake struck at 9:39 p.m. a few miles ...