Hundreds of earthquakes have been detected at Mount Rainier so far Tuesday morning in the largest such swarm at the active stratovolcano since 2009, according to the U.S. Geological Survey.

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

A swarm of small earthquakes began early Tuesday morning beneath Mount Rainier, with more than several hundred minor tremors recorded as of midday, according to scientists with the U.S. Geological Survey and the University of Washington.