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As part of the Cascade Range of mountains, Mount St. Helens was formed by eruptive flows of magma as the Juan de Fuca tectonic plate is forced under the North American Plate. Beginning about 37,600 years ago, periodic eruptions and magma flows occurred in the area between Mount St. Helens and Mount Rainer. Huge eruptions occurred in the years 1480, 1482, and 1800, and smaller releases of steam and ash between 1831 and 1857. The large magma chamber beneath Mount St. Helens will likely continue to force lava upward and cause future eruptions. However, as history indicates, they could be several hundred years apart. The May 18, 1980 eruption was the first major eruption since 1800, and was 123 years after the last release of steam and ash in 1857.
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When was mount saint Helens discovered?
Mount Saint Helens was discovered by George Vancouver on May 19, 1772.
Is mount St Helens in New Hampshire?
No. Mount Saint Helens is in Washington state.
Which mountain erupted in 1980 in Washington US?
Mount St. Helens is a active volcano, in the Washington State.
When is mount saint Helens going to explode next?
There is no way of knowing. The timing of volcanic eruptions cannot be predicted accurately, even when a volcano is getting ready to erupt. Currently Mount St Helens is not showing any signs of imminent activity.
What is a volcano that hasn't erupted in a long time and is unlikey to erupt again?
An extinct volcano has not had an eruption for at least 10,000 years and is not expected to erupt again in a comparable time scale of the future
Which country is mount saint Helens in?
Mount saint helens is located in the U.S.A.
Is Mount saint Helens in Washington?
Yes. Mount Saint Helens is located in Washington.
Where is Mount Saint Helens found in?
mount baker,mount rainier and mount hood surround mount saint helens
Can mt saint helens still erupt?
yes it can
Will mt saint helens erupt in the future?
yes
What olate is mount saint helens situated on?
Mount Saint Helens is situated within the Gifford Pinchot National Forest. The olate that Mount Saint Helens is situated is called the subduction zone.
What volcano is close to mount saint Helens?
Mount Saint Helens is the valcano. It's pretty close to itself.
When was mount saint Helens discovered?
Mount Saint Helens was discovered by George Vancouver on May 19, 1772.
Is mount Saint Helens east of Mount Rainier?
No. Mount St. Helens is south-southwest of Mount Ranier.
Is mount St Helens in New Hampshire?
No. Mount Saint Helens is in Washington state.
Which mountain erupted in 1980 in Washington US?
Mount St. Helens is a active volcano, in the Washington State.
What did mount saint helens do?
erupted
