A seismologist from Seattle discussed recent volcanic activity across the United States. Here's what you should know.

A powerful undersea earthquake struck off the southern coast of Alaska on Wednesday, setting off a tsunami advisory and prompting concern along the state’s remote peninsula region.

The United States Geological Survey (USGS) shows lava fountains shooting up high in the latest episode of an ongoing eruption of Kilauea volcano inside Hawaii Volcanoes National Park on Wednesday, June 11,

Officials at the United States Geological Survey have tracked over 300 earthquakes beneath Washington State's Mt Rainier from July 8-10.

Seismicity has decreased” from 30 events per hour at the peak to a few per hour as of Saturday morning, the U.S. Geological Survey said Saturday.

One of the most famous mountains in Washington, Mount Rainier, has been rumbling over the last day due to the amplified seismic activity.

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.

This is now the largest recorded earthquake swarm at Mount Rainier since seismic monitoring at the volcano began in 1982, the Cascades Volcano Observatory said. With quakes ongoing, the swarm has already surpassed a major event in 2009 “in terms of magnitude, total events, event rate, and energy release.”