Scientists have recorded the "largest" earthquake swarm at Mount Rainier in Washington state since 2009, the U.S. Geological Survey reported. The swarm at the second-most seismically active ...

Mount Rainier is considered an active volcano and has not had a significant eruption in the past 500 years.

A snowcapped backdrop to Seattle and Puget Sound, Mount Rainier is a slumbering giant that last erupted in the 1890s.

More than 300 earthquakes have erupted at Washington's Mount Rainier this week, the largest earthquake swarm at the volcano since 2009. As of Thursday, July 10, 334 earthquakes had been identified ...

The so-called earthquake swarm at Mount Rainier dwindled Friday but has surpassed the last large event at the volcano in 2009, the USGS said.

Swarms can occur once or twice at year at Mount Rainier, though the number of quakes involved are usually smaller, the volcano observatory said.

The United States, a volcanic hotspot, boasts 169 Holocene volcanoes, primarily in Alaska, Hawaii, and the Pacific Northwest.

More than 300 earthquakes have erupted at Washington's Mount Rainier this week, the largest earthquake swarm at the volcano since 2009. As of Thursday, July 10, 334 earthquakes had been identified ...

The so-called earthquake swarm at Mount Rainier dwindled Friday but has surpassed the last large event at the volcano in 2009, the USGS said.