Seismic activity around Mount St. Helens quieted after the mid-80s. According to the USGS, the area experienced the fewest ...

Seismic activity around Mount St. Helens quieted after the mid-80s. According to the USGS, the area experienced the fewest earthquakes since the eruption ... Helens or Mount Rainier, one of ...

A mysterious and highly active undersea volcano off the Pacific Coast could erupt by the end of this year, scientists say.

Between April and September on the Amtrak Coast Starlight between Seattle and Portland, you can catch a national park guide ...