The Mount Helen's 1980 eruption was a major volcanic eruption.
The expansion of gases in lava caused by decreasing pressure as it rises to the surface can make for very explosive eruptions, such as the last eruption of Mt. St. Helens.
volcano eruptions are triggered by seismic activity, meaning earthquakes and such. Mt St Helens is along the ring of fire, which is full of seismic activity.
About 92 miles to Mt. St. Helens from Tacoma
This volcano erupted since 1805 to 1951
The last eruptive activity of Mount St Helens was in July of 2008.
for its deadly eruption a long time ago
The 1980 eruption of Mount St. Helens.
Helen
how did people prepare for the mt. st. helens eruption
the largest volcanic eruption in american history was the one at mount st helens on the 18th of may 1980
Mt Saint Helens erupted when plates collided together and made the eruption blast! The last time Mt Saint Helens erupted was July, 10, 2008!!!!!!!!!!!!!!!!!!!!!
Mt St Helens first erupted on May 18, 1980
The Mount Helen's 1980 eruption was a major volcanic eruption.
About 2 cubic km of material was erupted. About the size of the Mt St Helens eruption in 1980.
57 People died in the eruption.
The 1980 eruption of Mount St Helens was a VEI 5.