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March 20, 1980-A magnitude 4.2 earthquake signaled the reawakening of the volcano after 123 years.

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Q: When was the earthquake that signaled that Mt. St. Helen's had reawakened?
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Related questions

Where was there an earthquake?

in Mt. St. Helens theree was one 1800's to 1850's


Was there an earthquake?

in Mt. St. Helens theree was one 1800's to 1850's


Where was the explosion of mt st Helens?

At Mt. St. Helens.


What Volcano in the northwestern US?

Mt. St. Helens Mt. St. Helens


How many miles is Tacoma from Mt Rainier and Mt St Helens?

About 92 miles to Mt. St. Helens from Tacoma


How was mount st Helen erupted?

Mt. St. Helens erupted by the pressure to make a volcano explode. Lava originates deep below the Earth's surface where it is still extremely hot, with magma at the bottom of the lava. a 5.1 earthquake triggered mt st helens to erupt


Continent where Mt Saint Helens is located.?

Mt. Saint Helens is located on the North American continent.


Where there warnings of mt st helens?

there were many warnings about mount St.Helen if they had an earthquake it would trigger the volcano to erupt causing the people to know if it will erupt or not


What mt range is mt st helens in?

ROCKIES


When was the first eruption of mt st helens?

Mt St Helens first erupted on May 18, 1980


Is Mt Saint Helens a volcano?

yes, Mt Saint Helens is a volcano. located in Skamania County, Washington


Is a any volcano bigger than mt st Helens?

NO no volcano is bigger than Mt st Helens