More than 300 earthquakes have erupted at Washington's Mount Rainier this week, the largest earthquake swarm at the volcano ...

The U.S. Geological Survey said it and other agencies were monitoring the situation and would issue additional alerts "as ...

Two of Arizona's most famous landmarks may be linked by cosmic violence: the asteroid that gouged out Meteor Crater may have ...

Early Tuesday morning, Mount Rainier experienced its largest seismic activity since 2009, with a swarm of small earthquakes detected. According to the United State Geological Survey, hundreds of ...

The Pacific Northwest Seismic Network recorded hundreds of small earthquakes at Mt. Rainier on Tuesday morning. The US Geological Survey (USGS) says this is the largest earthquake swarm at the ...

Scientists have recorded the "largest" earthquake swarm at Mount Rainier in Washington state since 2009, the U.S. Geological Survey reported. The swarm at the second-most seismically active ...

While earthquakes do occur on occasion in Florida, what you felt last night wasn't an earthquake, at least according to the U.S. Geological Survey.