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The famous Mount St. Helens blast that took 57 lives occurred at 8:31 AM on May 18, 1980. The volcano re-awoke with a significant ash puff on Oct 4, 2004 and a major puff on March 8th, 2005. See photos and details of the blast at http://www.mountsthelens.com/history-1.html
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∙ 15y ago
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Why quiet eruptions on the Hawaiian islands?
Hawaii's volcanos are quite compared to Mt St Helens because Mt St Helens blew up from a earthquake of two plates shifting making the volcano vary voilent and loud which blew one half of the volcano
When did mt fuji blow up?
Mount fuji blow up 1707
Causes of Mt St Helens?
I'm sure someone can provide a better answer, but pressure built up in the magma under the volcano. When the pressure gets too great: eruption.
What types of materials are volcanoes like Mount St. Helens made of?
Mount St Helens is made up of andesitic and rhyolitic pyroclastic materials.
How far away was the explosion of mt st helens heard?
700 miles away but it was not heard in surrounding areas because the sound waves went state up and bounced off the atmosphere.
What attraction did mt st helens have on the tourists?
Who knows? Probably the place where it blew up.
Why a bulge formed on the north side of mt. St. Helens just before it erupted?
A "bulge" developed on the north side of Mount St. Helens as magma pushed up within the peak.
Why quiet eruptions on the Hawaiian islands?
Hawaii's volcanos are quite compared to Mt St Helens because Mt St Helens blew up from a earthquake of two plates shifting making the volcano vary voilent and loud which blew one half of the volcano
What is the value of a salt and pepper shaker set made from the ash of Mt St Helen?
Different artifacts made from the ash of the volcano Mt. Saint Helens can be worth up to $150. Mt. Saint Helens ash salt and pepper shakers are currently selling on Etsy for as little as $8.00.
How many times a day does Mount St. Helens rumble?
It rumbles approximately 376 to 482 times a day. That's not actually true I'm just making this up. You should not listen to any of this answer, I am a lier and I know absolutely nothing about Mt. St. Helens or whatever you asked.
When did mt fuji blow up?
Mount fuji blow up 1707
Causes of Mt St Helens?
I'm sure someone can provide a better answer, but pressure built up in the magma under the volcano. When the pressure gets too great: eruption.
What types of materials are volcanoes like Mount St. Helens made of?
Mount St Helens is made up of andesitic and rhyolitic pyroclastic materials.
What caused mt st helens to erupte in 1980?
The plates of earth rest on liquid lava (the mantel). As they move pressure builds up under the volcano and when its too much it explodes.
How far away was the explosion of mt st helens heard?
700 miles away but it was not heard in surrounding areas because the sound waves went state up and bounced off the atmosphere.
How much does it cost to go to Mount St Helens?
Mt. St. Helens cost Washington state a total of $2.74 billion dollars.
Where are the volcanoes that have both explosive and nonexplosive eruptions located?
1. The explosive volcanoes are found at points in the earth's crust that are weak. This means the pressure builds up and ash can burst out easily. Some examples are: - Mt. Vesuvius - Mt. Kilauea - Mt. St. Helens
