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  1. 1. Alaska Volcanoes By Dominique Johnson
  2. 2. Augustine Volcano  Augustine Island.  Augustine volcano is on Augustine island  It was last active in December 2005  It is 4134 feet tall  It is an active volcano  The volcano is a central dome cluster. It has central dome and lava flow complex. It is surrounded by pyroclastic debris.  Volcano- A vent in the earth in which lava comes out.  Dome- resembles a half of a sphere.  Pyroclastic- fragments of rock form a volcano
  3. 3. Mount Cleveland      Located on Chuginadak Island It is 5676 feet high It is an active volcano Last eruption was May 4, 2013 It is a Stratovolcano, it is symmetrical in form. 8.5 km in diameter. Joined on to the lower east part of the island. The island is by a low narrow strip of land  Stratovolcano- a volcano built up of alternate layers of lava and ash  Symmetrical- made up of exactly similar parts facing each other or around an axis.
  4. 4. Frosty Peak     It is Located in Cold Bay It is 6299 feet high It is an inactive volcano The frosty peak volcano is a Stratovolcano. It has two craters in it. West wall is ice filled. The northern wall has a large glacier on it.  Coalescing Craters- grown together  Valley-a low area of land between hills or mountains
  5. 5. Snowy Mountain      Located in Katmai It is 7090 feet tall It is an active volcano Last active in 2001 It has lots of snow and ice on the mountain. Glacier covers about 90% of the volcano.  Glaciers- a slowly moving mass or river of ice formed by the accumulation and compaction of snow on mountains or near the poles.
  6. 6. Mount Wrangell  Mount Wrangell is located in Wrangell  It is 1416 feet tall  It is an active volcano  Last active on March 26,1930  It is a shield volcano with summit caldera. It has a volume of 900 cubic km. Top has an ice summit filled caldera.  Shield Volcano- A shield volcano is a type of volcano usually built almost entirely of fluid lava flows  Summit-the highest point of a hill or mountain.  Caldera-large volcanic crater, typically one formed by a major eruption leading to the collapse of the mouth of the volcano.
  7. 7. There are 130 volcano's/volcano fields in Alaska.
  8. 8. There are currently 90 active volcanoes in Alaska
  9. 9. Volcanoes could affect aircraft by causing the engine to fail after ingesting volcanic ash. Airports could be closed due to a volcano erupting.
  10. 10. Volcano eruptions could also affect people. They could affect people with asthma or respiratory problems. Debris could cover human communities. Volcanic gases in the air may be poison.
  11. 11. We see about 1.3 volcano eruptions in Alaska per year on average.