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

Mount Rainier was experiencing "the most significant seismic activity" at the volcano in more than 15 years as an "earthquake ...

More than 400 earthquakes rattled Washington's Mount Rainier over just 12 hours on Tuesday, sparking fears that the ...

Swarms — or clusters of earthquakes that occur in the same area in quick succession — are relatively common on Mount Rainier.

Seismologists are closely monitoring Mount Rainier after a swarm of earthquakes struck the Pacific Northwest’s tallest ...

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On Tuesday, hundreds of earthquakes were detected, with depths ranging from 1.2 to 3.7 miles below the summit.

The earthquakes are not currently a cause for concern, and do not indicate an impending eruption, the U.S. Geological Survey ...

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

MT. RAINIER, Wash. — A swarm of small earthquakes was detected at Mount Rainier Tuesday morning, according to the U.S. Geological Survey Cascades Volcano Observatory (CVO) and the Pacific Northwest ...