Spurr Stratovolcano

Volcano Characteristics

• Stratovolcano
• 11070 ft (3374 m) elevation
• Summit Caldera- crater like structure at summit
• Covered in ice or snow during cold seasons

Andesitic Lava

• 55-65% Andesite
• Low amount of Fe, Mg, Ca, Na, and K
• 800-1000 degrees celcius
• Intermediate viscosity and gas content

Alaska

Volcanic Vent

• Caldera at the summit
• Only one vent
• Active- last erupted in 1992
• Pyroclastic flows mixed with ice and made lahars
• Explosive: pyroclastic flows are the largest concern
• Can be explosive

Rocks from Activity

• Andesite rocks are formed from the andesitic lava
• Usually has some activity every 10 or so years
• 1000 years for major eruptions
• Release of Sulfur Dioxide

Population

• About 1 person lives per square mile in the area
• Some small town near with population of about 100-300
• No myths or deep culture surrounding it
• Ash spreads throughout the state and parts of Canada
• People can inhale it
• Homes destroyed by lahars

Scientific Tecniques

• Seismaclly monitored all over Alaska Range
• Scientists monitor seismically to get more accurate data of all earthquakes
• More data, higher accuracy of predictions

Action Plan

• Not hard to evacuate small populations
• Can leave by boat, plane, or even car
• People could be evacuated by helicopter if needed

Works Cited

“Demographics of Alaska.” Wikipedia, Wikimedia Foundation, 4 Oct. 2017, en.wikipedia.org/wiki/Demographics_of_Alaska.

Global Volcanism Program | Akutan, volcano.si.edu/volcano.cfm?vn=311320.

Heather.McCullough. “NOAA/NESDIS/NGDC/MGG-Natural Hazards Images.” NOAA National Centers for Environmental Information (NCEI), U.S. Department of Commerce, 21 Feb. 2007, www.ngdc.noaa.gov/hazardimages/event/show/261.

“Spurr Reported Activity.” Spurr - Historic Eruptions, avo.alaska.edu/volcanoes/volcact.php?volcname=Spurr.