Mount Akutan

The Mount Akutan is a 1303 m high stratovolcano of the Aleutian Island chain on the Alaska Peninsula. Mount Akutan is one of the most active volcanoes in the region.

Description and significant eruptions

Its summit consists of a 2 km wide and up to 365 meters deep caldera. Two outbreak centers are located on the northwest flank. A cinder cone produced a lava flow in 1852, which increased the shoreline and "Lava Point " shaped. The caldera was formed during an explosive eruption about 1600 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 lava outlet). 1978 crossed a lava flow a narrow opening in the northern part of the caldera wall and reached almost to the coast. At the bottom of the caldera there are some fumaroles. Hot springs are found in the northeast of the caldera and along the coast at Hot Springs Bay. In the vicinity of the volcano, there are several thermal springs.

Further eruptions

Earlier, some of them serious eruptions were dated using the radiocarbon method at 7620 ± 300 BC, about 4150 BC, as well as about the year 340 ( ejection of several cubic kilometers of tephra ). Historical records also show outbursts in 1848, 1852, 1865, 1867, 1883, 1887, September 1892, 1896, 1907, February 1908, 1911, 1927-1928, 1929, May-August 1931 from December 1946 to January 1947, April until August 1948, October 1951, 1953, November 1962, 1972, 1973, 1974, 1976, 1978, July 1980, October 1982 to May 1983 18 March to 30 June 1986, 31 January to 24 June 1987 26. March to July 20, 1988, February 27 up to March 1989, January 1990, 6th September-October 1990 15 September to October 1991, 8 March to 21 May 1992, and December 1992.