North West USA - State of Washington - Part of Cascade Mountains
1 of 10
What type of volcano is it?
Composite cone
2 of 10
What type of plate boundary is Mt S Hs located on? and which plates?
Destructive and the Jaun De Fuca plate (being subducted) and the North American plate
3 of 10
When did the eruptopn of Mt S Hs begin?
8:32 am - Sunday 18th May 1980
4 of 10
Name some social impacts of Mt St Helens?
56 killed within blast zone, lahars destroyed 200 homes,27 bridges, 185 miles of road, 15 miles of railway, but tourist industry grown due to to fame of eruption
5 of 10
Name some economic impacts of Mt St Helens?
some logging camps destroyed, 12% of crops damaged, losses in washington - $800 million - half of which was loss of forestry
6 of 10
Name some enviromental impacts of Mt St Helens?
Spirit lake was filled by landslide, 250km sqrd of forestry = destroyed, 14/32 species has survived, 250km of river ecosystems = destroyed, 7,000 big game animals = died
7 of 10
What was the management in the area?
Excclusion zone set up in march with red zones (no activity) and blue zones (limited activity) 2,000 people were evacuated, many ignored warnings
8 of 10
What were the immediate responses?
national guard - helicopters - saved 130 people, NG issued clean water, food and medical supplies, 2 million gas masks distributed, ash cleared in 3 days
9 of 10
Name the long term responses?
Toutle, Cowlitz and Columbia rivers = dredged, 10 million trees planted, bridges rebuilt with wider span, volcano is now monitored constantly
10 of 10
Other cards in this set
Card 2
Front
What type of volcano is it?
Back
Composite cone
Card 3
Front
What type of plate boundary is Mt S Hs located on? and which plates?
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