The plates of earth rest on liquid lava (the mantel). As they move pressure builds up under the volcano and when its too much it explodes.
Mt St Helens first erupted on May 18, 1980
Mt st helens erupted
The volcano that erupted in 1970 was Mount St. Helens in Washington state, USA. The eruption occurred on May 18, 1980, resulting in the catastrophic eruption that caused significant damage and loss of life.
The 1980 eruption of Mount St. Helens.
mt. st. Helens erupted in may 18, 1980
The 1980 eruption of Mount St Helens was a VEI 5.
Mount St. Helens is a active volcano, in the Washington State.
people died
Mt Helens
On May 18th 1980.
18th of May 1980
how many days did it take for the ash get in the air from the eruption from mt st Helens in 1980