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Volcano Project Per.1

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Teegan Ritchey

on 5 December 2016

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Transcript of Volcano Project Per.1

By: Jasmine Owings, Teegan Ritchey, Quentin Pappas

Mr. Rudningen

Per.1 Geology
Mount Okmok
and
Mount St. Helens
Mt. St. Helens Eruption (1980)
Quick Quiz
What was the VEI for the Mount Okmok explosion?
Work Cited
United States Geological Survey. "Explosive Eruption Of Okmok Volcano In Alaska." ScienceDaily. ScienceDaily, 21 July 2008.
Mount Okmok
Located in Alaska
The last known eruption was July 12, 2008
Okmok volcano in Alaska continues to produce explosions and ash plumes through a newly created vent poses hazards to air travel in the area
The eruption began unexpectedly, sending up a wet, ash and gas-rich plume that reached an altitude of 50,000 ft above sea level.
Mount Okmok
The explosion resulted in a VEI of 4.
High viscosity level resulted in a fluid, tall eruption.
There were a vast array of volcanic hazards: volcanic gas, lava flow, fast moving clouds of ash, larger debris and hot gas.
Zero deaths or injuries
The Okmok formed during catastrophic eruptions 2,000 years ago.
After the eruption ash plume spanned several hundred miles across the North Pacific, causing many trans-Pacific flights to be diverted and cancellation of flights to the Dutch Harbor Airport.

Volcano Group Project
Mount St. Helens
Located in Southwestern Washington
Mount Okmok Eruption (2008)
Last erupted 36 years ago
The blast took more than 1,300 feet off the top and rained volcanic ash for miles around
During the past 4,000 years, Mount St. Helens has erupted more frequently than any volcano in the cascade range.
Mount St. Helens
Mount St. Helens released 24 megatons of thermal energy, with a VEI number of 5.
Mount St. Helens has 64% of silica content and about 4% of water. The viscosity level is high.
If Mount St. Helens reawakened, an ash plume reaching 30,000 feet could materialize in as little as five minutes, grounding aircraft and wreaking havoc on agriculture, water and power supplies, and human health.
(cont.)
Mount St. Helens
Some natives of the pacific Northwest variously called Mount St. Helens "Louwala-Clough" or "Smoking Mountain". Mount St. Helens was given to the peak in 1792 by Captain George Vancouver of the British Royal Navy a seafarer and explorer.
(Fun Facts)
(cont.)
Mount St. Helens
In a matter of hours it caused loss of lives and wide spread destruction of valuable property, primarily by debris, the lateral, and the mud flows.
(Historical Significance and summary)
The eruption resulted in scores of injuries and the loss of 57 lives.
Mount Okmok
Trees amounted to more than 4 billion board feet of salable timber were destroyed or damaged, primarily by the lateral blast.
(Historical Significance and Summary)
1300 feet was destroyed as the result of the explosion.
Mount Okmok has a long history of volcanic eruptions. (1817,1945,1958,1997,2008)
Mount Okmok is constantly being monitored by scientists in order to keep track of future activity.
The ash plume created from the 2008 eruption was not too detrimental to the surrounding environment/people because of how remote the location is in Alaska's Aluetian Islands.
How many people were killed as a result of the Mt. St. Helens eruption?
How much of Mt. St. Helens (in ft.) was destroyed following the explosion?
What years did both Mt. St. Helens and
Mount
Okmok erupt?
In which state is Mount Okmok located?
Bagley, Mary. "Mount St. Helens Eruption: Facts & Information". www.livescience.com. Live Science. 28 February 2013.
Driedge, Carolyn. "30 Cool Facts About Mount St. Helens". pubs.usgs.gov. USGS. 30 April 2010
Smithsonian Institution National Museum of Natural History Global Volcanism Program. Latest
Activity
Reports. volcano.si.edu. 18 March 2009.
Full transcript