Skip to main content
← Back to map
⇄ Compare

Mount Moffett

Moffett

Stratovolcano · United States · 1196m

Mount Moffett has several flank lava domes and is seen here across Andrew Bay to the SW from Mount Adagdak. Andrew Bay volcano is the oldest of three volcanic centers on northern Adak Island. Mount Moffett rises above Adak (out of view to the left), the largest town of the Aleutians.
Mount Moffett has several flank lava domes and is seen here across Andrew Bay to the SW from Mount Adagdak. Andrew Bay volcano is the oldest of three volcanic centers on northern Adak Island. Mount Moffett rises above Adak (out of view to the left), the largest town of the Aleutians. · Photo: Photo courtesy of Alaska Volcano Observatory, U.S. Geological Survey. · Wikimedia Commons
Type
Stratovolcano
Country
United States
Region
North America Volcanic Regions / Aleutian Ridge Volcanic Arc
Elevation
1196m
Coordinates
51.944, -176.747
Last eruption
-1600
Tectonic setting
Subduction zone / Intermediate crust (15-25 km)
Landform
Composite
Major rock type
Andesite / Basaltic Andesite
Geological summary

Rising above Adak, the largest town of the Aleutians, Mount Moffett is a modest-sized, eroded stratovolcano with several flank lava domes. The summit cone has been largely destroyed by glacial erosion, and has been filled by an andesitic plug dome. Five other lava domes are scattered over the flanks of the volcano. The south flank lava dome is one of the youngest features of the northern Adak Island volcanoes. The Heart Lake lava flow west of Sweeper Cove on the SE side of the volcano is another young volcanic feature. Several Holocene ash layers on Adak Island have been attributed to Moffett volcano. Its proximity to Adak Naval Air Station makes this one of the most accessible of the Aleutian volcanoes. Kiguga Warm Springs are located at Cape Kiguga, west of Mount Moffet, and the northern part of Adak Island has been investigated for geothermal power production.

From Wikipedia

Mount Moffett is a mountainous stratovolcano that forms the summit of Adak Island of the Aleutian Islands in the U.S. state of Alaska. Its peak reaches 3,924 feet (1,196 m). It is heavily glaciated and is made primarily of high alumina basalt and andesite. It has never had an eruption in recorded history. The southern flank of the mountain is assumed to be its youngest side. In comparison to other Aleutian stratovolcanoes, Moffett is a small vent, characteristic of its mixed composition.

Wikipedia · CC BY-SA · Read full article →

Eruption history

Summary (VEI over time)
Click a bar to see individual eruptions
7850 BCE~7642 BCE · 1 eruptions · max VEI ?3892 BCE~3683 BCE · 1 eruptions · max VEI ?1808 BCE~1600 BCE · 1 eruptions · max VEI ?7850 BCE6392 BCE4725 BCE3267 BCE1808 BCE

Detailed timeline

  1. 1600 BCEVEI ?Geological estimate
    BCE 1600 – Ongoing
  2. 3750 BCEVEI ?Geological estimate
    BCE 3750 – Ongoing
  3. 7850 BCEVEI ?Geological estimate
    BCE 7850 – Ongoing

External links

⚠ For reference only. Not for emergency response.