Mount Akutan
| Mount Akutan | ||
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| height | 1303 m | |
| location | Alaska Peninsula ( USA ) | |
| Mountains | Aleutian chain | |
| Coordinates | 54 ° 8 '4 " N , 165 ° 59' 10" W | |
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| Type | Stratovolcano | |
| Last eruption | 1992 | |
The Mount Akutan is a 1,303 m high stratovolcano of the Aleutian Range on the Alaska Peninsula . Mount Akutan is one of the most active volcanoes in the region.
Description and major eruptions
Its summit consists of a 2 km wide and up to 365 meters deep caldera . Two outbreak centers are on the northwest flank. A cinder cone produced a lava flow in 1852, which enlarged the coastline and formed "Lava Point". The caldera was formed during an explosive eruption around 1,600 years ago and contains at least three crater lakes. The active cinder cone in the northeast part of the caldera is the source of frequent explosive eruptions in the recent past (also known as lava leakage). In 1978 a lava flow crossed a narrow breakthrough in the northern part of the caldera wall and almost reached the coast. There are some fumaroles at the bottom of the caldera. Hot springs can be found in the northeast of the caldera and along the coast at Hot Springs Bay . There are several thermal springs in the area around the volcano .
More eruptions
Earlier eruptions, some of them severe, were measured using the radiocarbon method to 7620 ± 300 BC. BC, around 4,150 BC And dated to around the year 340 (ejection of several cubic kilometers of tephra). Historical records also show eruptions in the years 1848, 1852, 1865, 1867, 1883, 1887, September 1892, 1896, 1907, February 1908, 1911, 1927 to 1928, 1929, May to August 1931, December 1946 to January 1947, April to August 1948, October 1951, 1953, November 1962, 1972, 1973, 1974, 1976, 1978, July 1980, October 1982 to May 1983, March 18 to June 30, 1986, January 31 to June 24, 1987, 26 March to July 20, 1988, February 27 to March 1989, January 1990, September 6 to October 1990, September 15 to October 1991, March 8 to May 21, 1992 and December 1992.
Web links
- Mount Akutan in the Global Volcanism Program of the Smithsonian Institution (English)
- Description at the Alaska Volcano Observatory (English)
- Webcam Akutan, AVO