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 at ...

Several volcanoes in the 'Pacific Ring of Fire' have shown increased activity recently, prompting close monitoring by experts for potential eruptions. Also called the Circum-Pacific Belt, it is a ...

Mount Rainier was experiencing "the most significant seismic activity" at the volcano in more than 15 years as an "earthquake swarm" hit the site starting on Tuesday, according to the U.S. Geological ...

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