Mount St. Helens erupted, killing dozens and forever changing how the US monitors earthquakes. The volcano is still active ...

She had no idea her geologist husband had spent the morning in a plane flying by an erupting volcano ... its eruption. Its conical top collapsed into a horseshoe crater, sending rivers of mud ...

According to the USGS, Mount St. Helens is the most active volcano in the lower 48 states and the most likely in the Cascades ...

"No one died in the eruption; however, several people in the Hat Creek Valley escaped just before their homes were destroyed by a mud flow.Lassen ... "It is going to pop its top.

When you buy through links on our articles, Future and its syndication partners may earn ... and longer still since their last Top 20 hit, See Emily Play. “So we’d become an albums band ...

Once the bulge was gone, the volcano's magma system was depressurized and blew off the top of the mountain ... that humans ...

Once the bulge was gone, the volcano's magma system was depressurized and blew off the top of the mountain ... and would watch as nature took its course. “When the monument was established ...