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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.
What else can I help you with?
How mount st Helen form?
it was formed by the eruption of a volcano
What animal survived mount st Helen's first eruption?
fish
What was the worst place affected in mount St Helen's eruption?
The worst place effected by mount Helens eruption in 1980 was seattle.
How many people got killed in the mount st Helen eruption of 2008?
The eruption on May 19th 2008 has been classified as uncertain and no fatalities have been reported.
Before the eruption how many kilometers high was mount st helens?
Mount St. Helen had an altitude of 2 950 m before the eruption.After the eruption the altitude decreased to 2 550 m.
Was the eruption of Mount St Helen's a quiet eruption?
no it was a loud eruption
When did mount st Helen eruption?
May 18, 1980
What was the eruption of mount St Helen?
200,00 years ago
How mount st Helen form?
it was formed by the eruption of a volcano
What is the date of the most destructive eruption in Mount St. Helen?
1980
When was Mount St Helen's biggest eruption?
May 18, 1980
How did the eruption of Mount St. Helen's happen?
bdroo..pdam..boom
What is the date of the most destructive eruption of Mount St Helen?
1980
What animal survived mount st Helen's first eruption?
fish
What was the worst place affected in mount St Helen's eruption?
The worst place effected by mount Helens eruption in 1980 was seattle.
What year was the largest eruption in the us?
The largest eruption in the USA was Mount St. Helen's in Washington state.
Who did Mount St Helen's eruption affect?
local people and the environment in which the volcano was in.
