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Transcript of Mount Katmai
Mount Katmai is one of five stratovolcanoes near the Novarupta dome.
It is a stratovolcano with a central caldera. this calderais a lake filled caldera. It has a maximum elevation of 2047 m. Snow and ice descend into the crater and the lake.
By Julian Ashby
Ring of Fire?
Mount Katmai is on the edge of the Ring of Fire where the Pacific and North American plates collide.
This volcano was formed when Novarupta erupted. The 1912 eruption also formed the Valley of Ten Thousand Smokes.
Mount Katmai is located on the Alaskan mainland, but along the same line as the Aleutian Islands. It is on the Alaskan Peninsula at
58.27 N, 154.98 W to be exact!
This volcano is on a convergent boundary. It is also in a subduction zone where the Pacific plate is being subducted under the North American plate.
The most recent (and only) eruption at Katmai was from June 6-9 1912. Most people don't know, but it was the biggest eruption of the 20th century. This explosive eruption released a cloud of ash that rose 100,000 feet into the air. The expolsion was so huge, that on June 17, the ash cloud was above Algeria, Africa. A flood of pumice rushed out as a pyroclastic flow.
Lava & Other Features
I could not find any information about lava types any where on the web, nor in book of any other source.
The 1912 eruption of Mount Katmai produced 30 cubic km of rock ragments making it the largest eruption, in the world, of the 20th century. The erupton covered 9 cubic km in magma and 20 cubic km in ash making up two thirds of its total volume. The final third was pyroclastic flows which left deposits with a thickness of 200m! This area became known as the Valley of 10,000 Smokes.
Katmai's Central Caldera
During the Eruption
During the 60-hour eruption, life on Kodiak Island was immobilized. Falling ash and carbon dioxide caused darkness and suffocating. Water became undrinkable and radio communications were disturbed.Buildings and roofs were destroyed in avalanches of ash. Skies fist became clear again on June 9th.
"Wildlife on Kodiak Island and in the
Katmai region was decimated by ash and
acid rain from the eruption. Bears and
other large animals were blinded by thick
ash and many starved to death because
large numbers of plants and small animals
were smothered in the eruption. Birds
blinded and coated by volcanic ash fell
to the ground. Even the region’s prolific
mosquitoes were exterminated. Aquatic
organisms in the region perished in the
ash-clogged waters. Salmon, in all stages of
life, were destroyed by the eruption and its
aftereffects. From 1915 to 1919, southwestern
Alaska’s salmon-fishing industry was
Since Katmai is on the Ring of Fire, it needs to be closely monitored. Also, Alaska being the most volcanically active place in North America, there is bound to be stations near by. There are 19 monitoring stations in the Katmai area and 15 volcanoes in Katmai National Park.
Katmai Caldera. N.d. Photograph. Google Images. Web. 17 Nov. 2013. <http://www.google.com/imgres?client=firefox-a>.
Katmai National Park. N.d. Photograph. Google Images. Web. <https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcTEXwq5pSpf1p3QTGh-Jfd13lXCoJEshcjnYxe6ojfIhh5yjFBf9w>.
Valley of 10000 Smokes. N.d. Photograph. Google Images. Web. <https://encrypted-tbn2.gstatic.com/images?q=tbn:ANd9GcQTDER7kQ8CO9RU8xM6Jt7-JUnHenTqSOFv_xMPqCGWT-8XyEM>.
"Katmai National Park." The World Book Encyclopedia. Chicago, IL: World Book, 2012. 249. Print.
Ritchie, David, and Alexander E. Gates. "Katmai, Mount." Encyclopedia of Earthquakes and Volcanoes. New York: Facts on File, 2001. 117. Print.
"About Mount Katmai." About Mount Katmai. N.p., n.d. Web. 11 Nov. 2013.
"How Was Mt Katmai Formed?" Ask.com. N.p., n.d. Web. 11 Nov. 2013.
"Katmai an Active Alaskan Volcano." Sciences 360. N.p., n.d. Web. 11 Nov. 2013.
"Mount Katmai Description and Information." Katmai. N.p., n.d. Web. 11 Nov. 2013.
"Katmai Volcano." Katmai Volcano Site 3. N.p., n.d. Web. <http://www.virtual-geology.info/vft/2004-claire/katmai.htm>.
Great Eruption of 1912. Publication. N.p., n.d. Web. <http://www.avo.alaska.edu/pdfs/cit3475.pdf>.