Mount St Helens?
HOMEWORK HELP!
Answers:
http://vulcan.wr.usgs.gov/volcanoes/msh/.
http://volcano.und.edu/vwdocs/msh/.
http://www.ess.washington.edu/seis/pnsn/.
http://en.wikipedia.org/wiki/mount_st._h.
http://www.fs.fed.us/gpnf/volcanocams/ms.
http://whyfiles.org/031volcano/.
http://pubs.usgs.gov/gip/msh//
http://www.mtsthelens.net/
I keep these in handy. I have a thing for volcanoes.
try wikipedia. that place has TONNES of information. Id your doing a project on MSH.. You should mention the recent activity too.
All I know it errupted on May 18th 1980. It was rumbling for a few months up to that date. It totally changed the view of the landscape. I would suggest the Wikipedia web pages for more info.
Well, the force of the lava inside the volcano was enough to blow the side off of the volcano.
Pyroclastic flow and a heat barrier charred all of the forests surrounding the volcano.
Several towns had to be evacuated.
It blocked several rivers and killed the animals in them.
I was in Ephrata Washington 90 miles from the Mt. St Helens when it blew. We heard it, but one of us thought someone had slammed the front door and another said it was "Some sonic boom." I think my brother said, "Well, there goes the mountain? Walking home from church we saw this really awesome looking "storm cloud" heading our way, and by the time we got home it was snowing ash. In another 30 minutes it was blacker than a cloudless midnight. The cloud totally blocked the sun. I think the problems the ash caused was one of the untold stories about the eruption. The damage and death around the mountain was cataclysmic, but the ash caused months and even years of damage and head ache. If you want to know more, email mee and I'll provide more detail.
Mount St. Helens is most famous for its catastrophic eruption on May 18, 1980 at 08:32 Pacific Standard Time.[1] The eruption was the most deadly and economically destructive volcanic event in the history of the United States. (In 1912, Mount Katmai, Alaska, was the site of the largest volcanic eruption in U.S. history.) 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 feet (2,950 m) to 8,364 feet (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, making it the largest in recorded history.[2] However, the scale of the blast pales in comparison to debris avalanches that have occurred in the geological past elsewhere on Earth.
Like most other volcanoes in the Cascade Range, Mount St. Helens is a great cone of rubble 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; another formed Goat Rocks dome on the northern flank. These were destroyed in the eruption of 1980.
You could get more information from the link below.
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