Mount Redoubt (Alaska)
| Mount Redoubt | |
|---|---|
Steaming at the active summit lava dome on May 8, 2009
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| Highest point | |
| Elevation | 10,197 ft (3,108 m) |
| Prominence | 9,150 ft (2,790 m) |
| Listing | |
| Coordinates | 60°29′07″N 152°44′35″W / 60.48528°N 152.74306°WCoordinates: 60°29′07″N 152°44′35″W / 60.48528°N 152.74306°W |
| Geography | |
 Mount Redoubt
Location in Alaska
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| Location | Lake Clark National Park and Preserve, Kenai Peninsula Borough, Alaska, United States |
| Parent range | Chigmit Mountains, Aleutian Range |
| Geology | |
| Age of rock | 890,000 years |
| Mountain type | Stratovolcano |
| Volcanic arc/belt | Aleutian Arc |
| Last eruption | March to July 2009 |
| Climbing | |
| First ascent | 1959 by C Deehr, J Gardey, F Kennell, G Wescott |
| Easiest route | snow/ice climb |
| Designated | 1976 |
Redoubt Volcano, or Mount Redoubt, is an active stratovolcano in the largely volcanic Aleutian Range of the U.S. state of Alaska. Located at the head of the Chigmit Mountains subrange in Lake Clark National Park and Preserve, the mountain is just west of Cook Inlet, in the Kenai Peninsula Borough about 180 km (110 mi) southwest of Anchorage. At 10,197 feet (3,108 m), in just over 5 miles (8 km) Mount Redoubt attains 9,150 feet (2,700 m) of prominence over its surrounding terrain. It is the highest summit in the Aleutian Range.
Active for millennia, Mount Redoubt has erupted four times since it was first observed: in 1902, 1966, 1989 and 2009, with two questionable eruptions in 1881 and 1933. The eruption in 1989 spewed volcanic ash to a height of 45,000 ft (14,000 m). It caught KLM Flight 867, a Boeing 747 aircraft, in its plume. After the plane descended 13,000 feet, the pilots restarted the engines and landed the plane safely at Anchorage. The ash blanketed an area of about 7,700 sq mi (20,000 km2). The 1989 eruption is also notable for being the first ever volcanic eruption to be successfully predicted by the method of long-period seismic events developed by Swiss/American volcanologist Bernard Chouet. As of August 2015, the Alaska Volcano Observatory has rated Redoubt as Aviation Alert Level Green and Volcano Alert Level Normal.
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