Mount Rainier is rattling with the most powerful earthquake swarm scientists have ever recorded at the volcano. Why it matters: Rainier's reputation as the Cascades' most dangerous volcano means even ...

Was that an earthquake you just felt or merely a big truck rumbling by? You don't have to wonder thanks to the U.S.

A 6.2 magnitude earthquake struck the Alaska Peninsula early Monday, with its epicentre located near Sand Point. No tsunami ...

Seismic activity shook parts of the Big Country early Sunday, with a series of earthquakes peaking at a 3.7 magnitude. The rumbles began shortly after midnight near Snyder, starting with a 1.7 ...