Following the opening of the new southern fissure, tiltmeters transitioned to showing deflationary motion typical of ...

"Our job is like being a bunch of ants crawling on an elephant trying to figure out how the elephant works," an observatory ...

The United States Geological Survey reports a major, preliminary magnitude 7.5 earthquake struck in the South Atlantic Ocean, prompting Chilean authorities to issue an advisory for a potential tsunami ...

A major, 7.5-magnitude earthquake struck in the South Atlantic Ocean on Thursday, according to the United States Geological Survey. The temblor happened at 10:16 p.m. Eastern, data from the agency ...

Hawaii’s Kilauea volcano resumed erupting Friday by shooting an arc of lava 100 feet into the air and across a section of its ...