Mount Rainier is an active stratovolcano 45 miles southeast of Tacoma and 60 miles south-southeast of Seattle. Its last eruption was "a light dusting of ash" in 1894, the USGS said in a report. Large eruptions haven't occurred for more than 1,000 years.

For U.S. earthquake scientists, Japan's 'megaquake' warning renewed worries about when and how to warn the public if they find clues that the 'big one' might be coming for the West COast.

Earthquakes can cause tsunamis that can be more harmful than the earthquake itself. In Washington state, a 7.5 magnitude earthquake could create a tsunami with waves up to 42 feet tall, according ...

Earthquakes can cause tsunamis that can be more harmful than the earthquake itself. In Washington state, a 7.5 magnitude earthquake could create a tsunami with waves up to 42 feet tall, according ...

READ MORE: Catastrophic volcano could soon erupt on the Pacific Northwest More than 400 earthquakes rattled Washington's Mount Rainier over just 12 hours on Tuesday, sparking fears that the catastrophic volcano could soon erupt. The US Geological Survey ...