What caused mtshasta to erupt?

Answer 1

Mt Saint Helens was caused to erupt because when two plates collided together-the continential (named:North American Plate) was forced over the oceanic crust (named: Juan De Fuca) causing the top of the moutain to blow over the side of the mountian. The oceanic crust goes deeper and deeper into the continential crust that when soon it reaches the lithosphere (the mantle) causing it to melt into lava. Then the hot pressure shoots up the magma chamber and shoots out the top causing mt saint helens. Mt saint helens erupted on May 18, 2000 in Skamania County in Washington. This explosion cause tons of ash, hot rock, and gas. Over 57 people were sadly killed in this eruption. The mountain range that mt saint helens was located on was the Cascade Range which was firts descovered by Thomas J. Dryer. Mt saint helens was a Plinian volcanoe, which meaning when it explodes there is not much lava spewing from the top. It is mostly ash coming out over 5 miles per hour out of the volcanoe. Mt saint helens is now dead in the year of 2013. but it did last erupt in june 10, 2004. -sydney

Answer 2

Because all mountains will soon erupt, and mt. shasta did and it will erupt again

Answer 3

mt shasta erupted because of the magma that became hot in earth's crust

-julissa