Left: An aerial view of the 600-foot lava dome in the crater of Washington's Mt. St. Helens, as seen between the May and July eruptions in 1980.

Until Mount St. Helens blew in 1980 ... cinder cone, and plug dome—can be found in Lassen Volcanic National Park, where they literally bubble and steam.

Mount Saint Helens in Washington ... according to the US Geological Survey. The volcanic elevation, which is 8,363 feet in ...

Drivers may be able to rep Smokey Bear, Mt. Saint Helens or historic Whidbey Island after this year's legislative session.

An curved arrow pointing right. Mount St. Helens has recently been swarming with geological activity, which could mean the giant American volcano is gearing up for its next big eruption.

A very common case study for volcanoes is the eruption of Mount St Helens in the USA in 1980. Other case studies include the eruption of Mount Etna in Sicily in 1974 and Heimaey eruption in ...

Lahars are very destructive volcanic mudflows that can swallow everything in their paths. During the Mount St. Helens eruptions, lahars flowed up to 60 miles destroying 200 homes. Lahars are one ...

"The great basin," he wrote, "has been formerly one vast crater of a now extinct volcano ... was a thousand times the size of the Mount St. Helens eruption in 1980, which killed 57 people ...

But it's hidden the day we're slated to go on Kenmore Air's Mount Rainier & Mount St. Helens Volcano Tour, meant to show off the iconic mountain. "Basically we'll take off out of Boeing Field ...

The Mount St. Helens Institute introduced a specialty license plate depicting a mountain goat in the foreground with the mountain viewable in the back. Its recognizable dome from the 1980 eruption ...