Mount Rainier experienced its largest earthquake swarm on record this week, but seismic activity is now significantly ...

The so-called earthquake swarm at Mount Rainier dwindled Friday but has surpassed the last large event at the volcano in 2009 ...

Valles Marineris in imagery captured the Mars Reconnaissance Orbiter. Global topography: NASA/GSFC CTX global mosaic: ...

At least two people said on social media that they felt the earthquake, according to the U.S. Geological Survey.

A 4.3-magnitude earthquake jolted a lake shoreline Friday, July 11, in Southern California, the U.S. Geological Survey ...

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More than 300 tremors were recorded below Mount Rainier over the course of three days. Scientists say they were too weak for ...

A magnitude 3.7 earthquake was reported near Monterey County early Saturday morning, according to USGS. The quake was ...

Seismicity has decreased” from 30 events per hour at the peak to a few per hour as of Saturday morning, the U.S. Geological Survey said Saturday.

Hundreds of small earthquakes have rattled Mount Rainier this week in the largest swarm of tremors in more than a decade.

Hundreds of small earthquakes were detected at Mount Rainier on Tuesday in the largest such swarm at the active stratovolcano ...