The tremors were too weak for humans to feel. But the frequency of them is the most since researches started monitoring the ...

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

Mount Rainier in Washington state has been rocked by more than 300 earthquakes the largest seismic swarm in nearly two decades. While officials insist there's no need for panic, experts are watching ...

Mount Rainier in Washington state has been rocked by more than 300 earthquakes the largest seismic swarm in nearly two decades. While officials insist there's no need for panic, experts are watching ...