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, the active volcano towering above southwestern Washington state, started rumbling — very lightly — on Tuesday. A swarm of small earthquakes was detected under the mountain triggering focused monitoring from officials. But researchers have determined there is no current threat of an eruption.

Mount Rainier National Park in Washington state recorded hundreds of light earthquakes early Tuesday morning, though the Cascades Volcano Observatory said they weren't indicative of a pending eruption of the park's underlying volcano.