An oceanic trench along the southern coastline of Alaska and the Aleutian islands
Map of the Aleutian Trench
The Aleutian Trench (or Aleutian Trough)[1] is an oceanic trench along a convergent plate boundary which runs along the southern coastline of Alaska and the Aleutian islands. The trench extends for 3,400 kilometres (2,100 mi) from a triple junction in the west with the Ulakhan Fault and the northern end of the Kuril–Kamchatka Trench, to a junction with the northern end of the Queen Charlotte Fault system in the east. It is classified as a "marginal trench" in the east as it runs along the margin of the continent. The subduction along the trench gives rise to the Aleutian Arc, a volcanic island arc, where it runs through the open sea west of the Alaska Peninsula. As a convergent plate boundary, the trench forms part of the boundary between two tectonic plates. Here, the Pacific Plate is being subducted under the North American Plate at a dip angle of nearly 45°. The rate of closure is 7.5 centimetres (3 in) per year.[2]
The Pacific plate subducting under the North American plate, leads to increased faulting. This subduction began in the Early Cretaceous and continues into the present day. Within and near the Aleutian Island arc and depending on the location, there is thrust faulting, strike-slip faulting, and normal faulting. These result in an increased amount of seismic activity. Earthquakes can reach magnitudes between 7-8.5.[3]
^Webster's New Geographical Dictionary. Springfield, Massachusetts: Merriam-Webster Inc. 1984. pp. 30. ISBN 0-87779-446-4.
^"Aleutian Trench". Archived from the original on February 25, 2014. Retrieved May 4, 2012.
^Lemenkova, Polina (2021). "Topography of the Aleutian Trench south-east off Bowers Ridge, Bering Sea, in the context of the geological development of North Pacific Ocean". Baltica: 27–46. doi:10.5200/baltica.2021.1.3. ISSN 0067-3064.
The AleutianTrench (or Aleutian Trough) is an oceanic trench along a convergent plate boundary which runs along the southern coastline of Alaska and...
the AleutianTrench. Although taking its name from the Aleutian Islands, this term is a geologic grouping rather than a geographic one. The Aleutian Arc...
0 in) per year. The Aleutian subduction zone includes two prominent features, the Aleutian Arc and the AleutianTrench. The Aleutian Arc was created via...
sediments has been documented in the Aleutiantrench. In addition to sedimentation from rivers draining into a trench, sedimentation also takes place from...
between mainland Alaska and Kamchatka. They are situated along the AleutianTrench as they were formed by the active subduction of the oceanic Pacific...
oceanic trenches, are created by geological movement of tectonic plates. Some oceanic trenches include the Mariana Trench and the AleutianTrench. The former...
the Aleutian Peninsula, leading from the Alaska state mainland to the Aleutian Islands Aleutian Range, a mountain range in Alaska AleutianTrench (or...
107 km. The quake was caused by oblique normal faulting along the AleutianTrench, a convergent boundary where the Pacific plate is subducting underneath...
The 1585 Aleutian Islands earthquake is the presumed source of a tsunami along the Sanriku coast of Japan on 11 June 1585, known only from vague historical...
the North American Plate forming the AleutianTrench and the corresponding Aleutian Islands (see also: Aleutian Arc). The Pacific Plate is almost entirely...
chain extends from south of the island of Hawaiʻi to the edge of the AleutianTrench, near the eastern coast of Russia. While most volcanoes are created...
having both island and continental arc sections is found behind the AleutianTrench subduction zone in Alaska. Volcanoes that occur above subduction zones...
combined rupture of the Japan Trench and Kuril-Kamchatka Trench, or individually the AleutianTrench or Peru–Chile Trench. Another possible area could...
Andreanof Islands group, which is part of the Aleutian Islands arc. The event occurred along the AleutianTrench, the convergent plate boundary that separates...
Chersky Range in the west, to another triple junction with the AleutianTrench and the Kuril Trench in the east. From the offset of dated geomorphological features...
Near Islands segment of the Aleutian Islands. It has been subducted under the North American Plate at the AleutianTrench, being replaced by the Pacific...
curved form, a chain of active or recently extinct volcanoes, a deep-sea trench, and a large negative Bouguer anomaly on the convex side of the volcanic...
American Plate meet across the neck of Alaska, following the line of the AleutianTrench, rather than meeting at the Bering Straits. Northern Asia is built...
the Okhotsk Plate, and finally the AleutianTrench to the end of the Queen Charlotte Fault system (see also: Aleutian Arc). The westerly boundary is the...
Islands and rises about 10,000m (33,000 ft) from the bottom of the AleutianTrench 140 miles south of the volcano. The volcano's topographic contour lines...
sections) forming the AleutianTrench. The oceanic Pacific Plate subducts beneath the continental Okhotsk Plate at the Japan Trench. The oceanic Philippine...
Pacific Plate beneath the North American Plate. This plate boundary, the AleutianTrench, has been the location of many megathrust earthquakes. The 1965 Rat...
eventually slide past San Francisco, then continue northwestward toward the AleutianTrench, over a period of perhaps twenty million years. The San Andreas began...
faulting on the Aleutian subduction zone where the Pacific plate subducts underneath the North American plate, forming the AleutianTrench and Arc. This...
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