Give me some information on Mount St. Helens.

Reader

The recent series of eruptions began on March 25, 1980, as a steam explosion. The first eruption of magmatic material occurred on May 18, 1980. That magma eruption was triggered by a landsliding of the north sl0pe of the volcano, which released pressure on a shallow magma chamber.

Sincerely,
Steve Mattox

Other Categories Other Questions
To VolcanoWorld