Cleveland is almost perfectly symmetrical and 5 miles 8 km wide at its base. It is also one of the most active volcanoes in the Aleutians. The m stratovolcano is one of the most active volcanoes of the Aleutian Islands. This July 24, , view from the west shows the summit region darkened by ashfall that may have originated from an eruption reported on May Dark lava flows from earlier eruptions can be seen on the flanks of the volcano.
Photo by Michelle Harbin, courtesy of U. Geological Survey. Numerous large lava flows descend the steep-sided flanks of the volcano. It is possible that some 18th to 19th century eruptions attributed to Carlisle should be ascribed to Cleveland Miller et al.
The eruption chart on this page shows just one eruption for the s - and the attribution of that eruption to Mount Cleveland is questionable. There could have been many more eruptions that went unnoticed or unrecorded. The island was more regularly seen by ships in the s, by aircraft in the s, and by continuous satellite monitoring in the s.
This increased observation probably explains why the recent record shows a greater number of eruptions. Activity at Mount Cleveland typically produces ash plumes, lava flows, pyroclastic flows and lahars. It has produced VEI 3 eruptions several times. These occurred on: February 6, ; February 2? The Smithsonian Institution has brief descriptions of historic eruptions and more detailed descriptions of recent activity.
Today the incentive to monitor volcanoes in the Aleutian Islands is very high because of the risk that they present to air traffic.
Ash clouds can damage aircraft and cause jet engine failure. AVO was formed in to monitor Alaska's hazardous volcanoes, predict and record eruptive activity, and mitigate volcanic hazards. A threat to international and local air traffic. Article by: Hobart M. Map: Where is Mount Cleveland? Simplified plate tectonics cross section Mount Cleveland plate tectonics: Simplified plate tectonics cross section showing how Mount Cleveland is located on an island above a subduction zone formed where the Pacific plate descends beneath the North America plate.
Did You Know? AVO has a webcam pointed at Mount Cleveland. Mount Cleveland is about 45 miles 72 kilometers from the camera and can be seen on days with excellent visibility. Mount St. Find Other Topics on Geology. Maps Volcanoes World Maps. Facts About Mount Cleveland.
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