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[2]
Mountain type
Stratovolcano
Volcanic arc/belt
Aleutian Arc
Last eruption
March to July 2009[3]
Climbing
First ascent
1959 by C Deehr, J Gardey, F Kennell, G Wescott[1]
Easiest route
snow/ice climb
U.S. National Natural Landmark
Designated
1976
Locations of volcanoes near Cook Inlet
Redoubt Volcano, or Mount Redoubt (Dena'ina: Bentuggezh K’enulgheli), 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 110 miles (180 km) southwest of Anchorage. At 10,197 feet (3,108 m), in just over 5 miles (8.0 km) Mount Redoubt attains 9,150 feet (2,790 m) of prominence over its surrounding terrain. It is the highest summit in the Aleutian Range.[4] In 1976, Redoubt Volcano was designated as a National Natural Landmark by the National Park Service.[5]
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.[6] The eruption in 1989 spewed volcanic ash to a height of 45,000 ft (13,700 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.[7] As of August 2015, the Alaska Volcano Observatory has rated Redoubt as Aviation Alert Level Green and Volcano Alert Level Normal.[3]
^Chouet, Bernard (1996-03-28). "Long-period volcano seismicity: its sources and use in eruption forecasting". Nature. 380 (6572): 309–316. Bibcode:1996Natur.380..309C. doi:10.1038/380309a0. S2CID 4341826.
Redoubt Volcano, or MountRedoubt (Dena'ina: Bentuggezh K’enulgheli), is an active stratovolcano in the largely volcanic Aleutian Range of the U.S. state...
Alaska's MountRedoubt volcano began erupting on March 22, 2009, and activity continued for several months. During the eruptions, which lasted for several...
lakes, major salmon-bearing rivers, and two volcanoes, MountRedoubt and Mount Iliamna. MountRedoubt is active, erupting in 1989 and 2009. The wide variety...
the watershed there are several national parks and the active volcano MountRedoubt, along with three other historically active volcanoes. Cook Inlet provides...
lie in the West, and include MountRedoubt, Mount Iliamna, Hayes Volcano, Mount Augustine, Fourpeaked Mountain , and Mount Spurr. Most recently, Augustine...
mountains: MountRedoubt (3,108 m), Chigmit Mountains Iliamna Volcano (3,054 m), Chigmit Mountains Mount Neacola, (2,873 m), Neacola Mountains Mount Shishaldin...
Susitna Mountain. Her relatives followed, Kalifornsky said, to become MountRedoubt, Mount Iliamna and the Chigmit Mountain Range. Another wandered inland to...
produced during geological events as in the image of the 1990 eruption of MountRedoubt. Permanent gas is a term used for a gas which has a critical temperature...
months old at the time, flew through a thick cloud of volcanic ash from MountRedoubt, which had erupted the day before. The aircraft involved was a Boeing...
adjustment of +1.392 m (4.57 ft) from NGVD 29 to NAVD 88. The elevation of MountRedoubt includes an adjustment of +1.412 m (4.63 ft) from NGVD 29 to NAVD 88...
A national redoubt or national fortress is an area to which the (remnant) military forces of a nation can be withdrawn if the main battle has been lost...
earthquakes, short bursts of seismic energy, to forecast the 1990 eruption of MountRedoubt in Alaska, these events are known to occur at volcanoes that do not...
February 24, 2017. "Mount Rainier National Park – Frequently Asked Questions". National Park Service. Retrieved February 28, 2017. "Mount Rainier National...
Rivers. They are predominantly non-volcanic, but include the stratovolcanoes Mount Baker, Glacier Peak and Coquihalla Mountain, which are part of the Cascade...
lost power to all four engines after flying into an ash cloud from MountRedoubt, Alaska. After dropping 14,700 feet (4,500 m) in four minutes, the engines...
Washington MountRedoubtMount Roosevelt Mount Rose Mount Ross Mount Saul Mount Scott Mount Seattle Mount Sefrit Mount Shuksan Mount Si Mount Spickard Mount Spokane...
Eastbourne Redoubt is a circular coastal defence fort at Eastbourne, East Sussex, on the south coast of England. It was built in 1805 as part of the British...
holding up many such North Cascade giants, as Mount Shuksan, MountRedoubt, Mount Challenger, and Mount Hozomeen, are all partly recrystallized by plutons...
there's a road where hell has frozen over". In this season the 2009 MountRedoubt eruptive activity caused complications; the truckers had to carry many...
Redoubt Mountain (alternatively MountRedoubt) is a mountain located in Banff National Park, in the Canadian Rockies of Alberta, Canada. It forms the...
southwest of Mount Spickard is intensely glaciated, with numerous glaciers, some very large, extending over 3 mi (4.8 km) to MountRedoubt. There are four...
Redoubt Glacier is in North Cascades National Park in the U.S. state of Washington, on the east slopes of MountRedoubt. Redoubt Glacier descends from...
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