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The lateral blast of Mt. St. Helens on May 18, 1980 was caused by a moderate earthquake that caused the north flank of the volcano to give way. This did cause the pressure that had been built to explosively release in a northern direction instead of the traditional vertical explosive eruption.
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∙ 11y ago
Wiki User
∙ 11y agoComposite volcanoes often erupt in violent explosions. The magma will build pressure beneath the vent, and will find the path of least resistance. If there is an easier path through the side of the mountain, the magma will take that route, as it did in Mt. Saint Helens.
Wiki User
∙ 12y agoit erupted side ways because when the magma couldt go one way it found a new path and erupted through another opening.It coulnd go out one way and the other opening was a side vent.
Wiki User
∙ 11y agoA "bulge" developed on the north side of Mount St. Helens as magma pushed up within the peak.
Wiki User
∙ 11y agoA "bulge" developed on the north side of Mount St. Helens as magma pushed up within the peak
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Did Mount St Helens erupt horizontally?
Yes. The 1980 eruption of Mount St. Helens started with a sideways explosion called a lateral blast, which was followed by a more normal vertical eruption column. While the lateral blast was the shortest phase of the eruption, it caused the most damage.
When did mount etna and mount st Helens erupt last?
The eruption of Mount St. Helens in 1980 lasted for 9 hours
How often does mount st helens erupt?
Mount St. Helen does not erupt in any pattern. When it erupted in 1980, scientist had no idea that it was going to erupt because it did not follow a pattern and it did not have very many precursor.
What is it called when a volcano erupts out sideways?
The term used when Mount St Helens erupted in such a manner was "lateral blast."
What is the classification of mount st Helens?
Mount St. Helens is an active stratovolcano
Which way did mt st helens erupt?
Sideways (Lateral Blast).
Did Mount St Helens erupt horizontally?
Yes. The 1980 eruption of Mount St. Helens started with a sideways explosion called a lateral blast, which was followed by a more normal vertical eruption column. While the lateral blast was the shortest phase of the eruption, it caused the most damage.
Do volcanologists believe that Mount St Helens will erupt again?
tots bro!!
When did mount etna and mount st Helens erupt last?
The eruption of Mount St. Helens in 1980 lasted for 9 hours
How often does mount st helens erupt?
Mount St. Helen does not erupt in any pattern. When it erupted in 1980, scientist had no idea that it was going to erupt because it did not follow a pattern and it did not have very many precursor.
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 is it called when a volcano erupts out sideways?
The term used when Mount St Helens erupted in such a manner was "lateral blast."
What is the classification of mount st Helens?
Mount St. Helens is an active stratovolcano
Where exactly is mount saint Helens?
mount st helens is located in gifford pinochot national forest
What was unusual about the eruption of Mount st helens?
Most major explosive eruptions eject a large plume of ash straight up. When Mount St. Helens erupted in 1980, the initial explosion was ejected sideways in what is called a lateral blast.
Did mt st helens erupt in 2004?
yes it did erupt in 2004
What is the pipe for mount st Helens?
the pipe for mount st. helens is none of your bissunes '
