The eruption of Mount St. Helens on May 18, 1980, was triggered by a magnitude 5.1 earthquake that caused a massive landslide, which removed the northern flank of the volcano. This sudden drop in pressure allowed magma to rise rapidly to the surface, leading to a violent explosive eruption. The eruption released a large plume of ash and volcanic gases, resulting in widespread devastation and altering the landscape significantly. It was one of the most significant volcanic events in U.S. history.
it was formed by the eruption of a volcano
fish
The worst place effected by mount Helens eruption in 1980 was seattle.
The eruption on May 19th 2008 has been classified as uncertain and no fatalities have been reported.
Mount St. Helen had an altitude of 2 950 m before the eruption.After the eruption the altitude decreased to 2 550 m.
no it was a loud eruption
May 18, 1980
200,00 years ago
it was formed by the eruption of a volcano
1980
bdroo..pdam..boom
May 18, 1980
1980
fish
The worst place effected by mount Helens eruption in 1980 was seattle.
The largest eruption in the USA was Mount St. Helen's in Washington state.
local people and the environment in which the volcano was in.