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

Mount Rainier on Tuesday experienced its largest seismic activity since 2009, with a swarm of small earthquakes detected. According to the United States Geological Survey, hundreds of earthquakes were recorded.

Mount Rainier experienced a significant earthquake swarm, the largest since 2009, with hundreds of small quakes detected near the summit. Experts attribute the tremors to hydrothermal fluids interacting with pre-existing faults beneath the volcano.