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ⓘ Aleutian Range




Aleutian Range
                                     

The Aleutian Range is a major mountain range located in southwest Alaska. It extends from Chakachamna Lake to Unimak Island, which is at the tip of the Alaska Peninsula. It includes all of the mountains of the Peninsula. The Aleutian Range is special because of its large number of active volcanoes, which are also part of the larger Aleutian Arc. The mainland part of the range is about 600 miles long. The Aleutian Islands are a partially submerged western extension of the range that stretches for another 1.600 km. However the official designation "Aleutian Range" includes only the mainland peaks and the peaks on Unimak Island. The range is almost entirely roadless wilderness. Katmai National Park and Preserve, a large national park within the range, must be reached by boat or plane.

The core Aleutian Range can be divided into three mountain groups. Listed from southwest to northeast, they are:

  • Mountains of the Alaska Peninsula and Unimak Island
  • Chigmit Mountains
  • Neacola Mountains

See Aleutian Islands for the continuation of the range to the west of Unimak Island. Just to the north of the Aleutian Range are the Tordrillo Mountains, the southeasternmost extent of the Alaska Range.

Selected mountains:

  • Mount Veniaminof 2.508 m, Alaska Peninsula
  • Mount Katmai 2.047 m, Alaska Peninsula
  • Double Peak 2.078 m, Chigmit Mountains
  • Mount Douglas 2.153 m, Alaska Peninsula
  • Mount Griggs, 2.317+ m, Alaska Peninsula
  • Mount Neacola, 2.873 m, Neacola Mountains
  • Pogromni Volcano 2.002 m, Unimak Island
  • Iliamna Volcano 3.054 m, Chigmit Mountains
  • Mount Pavlof 2.715 m, Alaska Peninsula
  • Mount Chiginagak 2.134 m, Alaska Peninsula
  • Mount Redoubt 3.108 m, Chigmit Mountains
  • Isanotski Peaks 2.446 m, Unimak Island
  • Mount Shishaldin 2.857 m, Unimak Island
  • Mount Denison 2.318 m, Alaska Peninsula
  • Mount Okmok 1.073 m, Fox Islands
                                     

1. Volcanic eruptions

Two volcanoes erupted during the summer of 2008 on the eastern Aleutian Islands. On July 12, 2008, Mount Okmok erupted, and it continued to erupt for a month. A giant, rapidly moving ash and gas cloud shot up to a height of 15.240 m as a result of this eruption.

Mount Kasatochi was home to the other eruption, which occurred on August 7 and 8. This eruption also sent up a gas cloud about 15.000 high. Together, these two power volcanic eruptions deposited emissions of trace gases an aerosols into the atmosphere. These emissions formed a sulfate aerosol layer that totaled a transfer of 1.6 Tg of SO 2 into the stratosphere and disturbed flights over this area for a short period following the eruptions.

                                     

2. Earthquakes

The 7.9 Mw Aleutian Islands earthquake occurred in June 2014 at an intermediate depth of 107 km. The quake was caused by oblique normal faulting along the Aleutian Trench, a convergent boundary where the Pacific plate is subducting underneath the North American plate at around 59 mm/year.

                                     
  • extends through the Alaska Peninsula following the Aleutian Range to the Aleutian Islands. The Aleutian Arc reflects subduction of the Pacific Plate beneath
  • Bering Sea and North Pacific Ocean The Aleutian Range a mountain range in Alaska The Aleutian Trench or Aleutian Trough a deep in the North Pacific
  • in Katmai National Park in Alaska, United States. It is part of the Aleutian Range and is located on the Alaska Peninsula. The mountain was presumably
  • The Aleutian Islands əˈluːʃən Russian: Алеутские острова Aleut: Tanam Unangaa, literally Land of the Aleuts possibly from Chukchi aliat, island
  • southwest towards the Alaska Peninsula and the Aleutians and trending southeast into the Pacific Coast Ranges The mountains act as a high barrier to the
  • The Aleutian Islands campaign was a military campaign conducted by the United States and Japan in the Aleutian Islands, part of the Territory of Alaska
  • The Chigmit Mountains are a subrange of the Aleutian Range in the Kenai Peninsula and Lake and Peninsula Boroughs of the U.S. state of Alaska. They are
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  • Mount Westdahl is a stratovolcano of the Aleutian Range in the U.S. state of Alaska. It is on Unimak Island, near the western tip of the Alaska Peninsula
  • Aleutians East Borough əˈljuːʃənz is a 2nd class borough in the U.S. state of Alaska. As of the 2010 census the borough s population was 3, 141. The
  • Lake and Peninsula Borough on the Alaska Peninsula. It is part of the Aleutian Range Its last eruption was in 1814. Ugashik - Peulik Global Volcanism Program