What happened at the volcanic erruption of Mount St. Helens 1980, I REALLY NEED THIS INFO PLEASE!!!!?

Question

I really need this info because wikipedia wont load on my internet. And i can't find any articles. i have a project due for tomorrow morning, so help would be sooo good!

Answer 1

The person above answered with the links. But basically instead of blowing out the top it was so plugged up with ash the pressure blew it out the side, thus creating a pyroclastic flow. Something never seen before, only ever had theories on it. Basically a pyroclastic flow is the ash broken into millions of pieces and flies up into the air in a massive column. It the reaches a point at which the velocity cannot be sustained, thus causing the ash to fall and cause a mass of ash 200 degrees++ to decend upon the earth. The effects are the ash basically slicing open your throat from the inside as the ash is like microscopic glass.

The relevance of the flow is that it explains what happened at Pompeii with the people who look like they are in casts of their former selves. Hope this gives you a little insight.

Answer 2

(now we can similar volcanoes "DORMANT"!!
I would do a very extensive search on GOOGLE , I would also use Yahoo search-_you should get brilliant results (you need to look carefully)~then all the results unfold b4 you.
2)Using " Google Search" I have found a "home work ' or home work help "~ web site which had been stsarted by a middle school or high school student & his dad ?
take a look at this ,it was around the net 3 or so years ago>
3)Also the lava erupting melted tonnes of frozen ice & snow causing molten mixed with water (mud slurries ) to roar down the hillside(mountain side) covering almost every thing in its path.( if you are living in north america its was like the snow avalanches you see in the rockies Or the European Alps.
Forests of Alpine pine and other plants were flattened./
Houses were swept away
the bill for insurance was very high- I- presume(?).
4)The Archivs : of the newspapers (of that State) should be on line( I guess , you could then do an Archive search,
cheers & happy searching,
good luck!!

Answer 3

The 1980 eruption of Mount St. Helens (VEI = 5, a million.2 km3 of cloth erupted) became a important catastrophic volcanic eruption interior the twentieth century. The eruption became the main significant to ensue interior the decrease forty 8 U.S. states in recorded history, exceeding the damaging skill and quantity of cloth launched via the 1915 eruption of California's Lassen height. The eruption became preceded via a 2-month-long sequence of earthquakes and steam-venting episodes, led to via an injection of magma at shallow intensity under the mountain which created a super bulge and a fracture device on Mount St. Helens' north slope. An earthquake at 8:32 a.m. on would 18, 1980, led to the comprehensive weakened north face to slip away, abruptly exposing the partly molten, gasoline- and steam-prosperous rock interior the volcano to diminish tension. The rock spoke back via exploding right into a super-heated combination of pulverized lava and older rock that sped in the direction of Spirit Lake so quickly that it at as quickly as handed the avalanching north face. A volcanic ash column rose intense into the ambience and deposited ash in 11 U.S. states. on the comparable time, snow, ice, and countless different comprehensive glaciers on the mountain melted, forming a sequence of enormous lahars (volcanic mudslides) that reached as a techniques using fact the Columbia River. much less intense outbursts endured into the next day just to be accompanied via different super yet no longer as damaging eruptions later in 1980. via the time the ash settled, 257 human beings (consisting of innkeeper Harry Truman and geologist David A. Johnston) and hundreds of animals have been lifeless, hundreds of sq. miles (mi2) decreased to desert, over one billion U.S. earnings injury had got here approximately, and the as quickly as-swish face of Mount St. Helens became scarred with a super crater opened on the north element of the mountain. the section became later preserved, because it became, interior the Mount St. Helens nationwide Volcanic Monument.

Answer 4

For the mountain in California, see Mount Saint Helena.
Mount St. Helens

3,000 ft (1 km) steam plume on May 19, 1982
Elevation 8,365 ft (2,550 m)
Location Washington, USA
Range Cascade Range
Prominence 4,605 ft (1,404 m)
Coordinates 46°12′00.17″N, 122°11′21.13″WCoordinates: 46°12′00.17″N, 122°11′21.13″W
Topo map USGS Mount St. Helens
Type Active stratovolcano
Volcanic arc/belt Cascade Volcanic Arc
Age of rock < 40,000 yrs
Last eruption 2004–2007 (ongoing)
First ascent 1853 by Thomas J. Dryer
Easiest route Hike via south slope of volcano
Mount St. Helens is an active stratovolcano in Skamania County, Washington, in the Pacific Northwest region of the United States. It is 96 miles (154 km) south of Seattle and 53 miles (85 km) northeast of Portland, Oregon. Mount St. Helens takes its English name from the British diplomat Lord St Helens, a friend of explorer George Vancouver who made a survey of the area in the late 18th century. The mountain is in the Cascade Range and is part the Cascade Volcanic Arc, a segment of the Pacific Ring of Fire that includes over 160 active volcanoes. This volcano is well known for its ash explosions and pyroclastic flows.

Mount St. Helens is most famous for its catastrophic eruption on May 18, 1980,[1] which was the deadliest and most economically destructive volcanic event in the history of the United States. Fifty-seven people were killed; 250 homes, 47 bridges, 15 miles (24 km) of railways, and 185 miles (300 km) of highway were destroyed. The eruption caused a massive debris avalanche, reducing the elevation of the mountain's summit from 9,677 ft (2,950 m) to 8,365 ft (2,550 m), and replacing it with a mile-wide (1.5 km-wide) horseshoe-shaped crater.[2] The debris avalanche was up to 0.7 cubic miles (2.3 km³) in volume. The Mount St. Helens National Volcanic Monument was created to preserve the volcano and allow for its aftermath to be scientifically studied.

As with most other volcanoes in the Cascade Range, Mount St. Helens is a large eruptive cone consisting of lava rock interlayered with ash, pumice, and other deposits. The mountain includes layers of basalt and andesite through which several domes of dacite lava have erupted. The largest of the dacite domes formed the previous summit, and off its northern flank sat the smaller Goat Rocks dome. Both were destroyed in the 1980 eruption.

Answer 5

Basically, as the magma(molton rock below the surface) was rising, it caused earth quakes. One side of St. Helen's was weak and collapsed just at the moment of the eruption. Because of this, most of the eruption went sideways instead of up.

M. Clark

Answer 6

hi Hellen,
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Answer 7

Try googal

Answer 8

this is a good overview...

http://www.geology.sdsu.edu/how_volcanoes_work/Sthelens.html


some 'facts' that are interesting found here...

http://www.olywa.net/radu/valerie/StHelens.html

scroll down.....