Amerika Serikat · Stratovolkan
Gunung Shishaldin
Shishaldin
- Tipe
- Stratovolkan
- Ketinggian
- 2857 m
- Letusan terakhir
- 2023
- Tipe
- Stratovolkan
- Negara
- Amerika Serikat
- Wilayah
- Amerika Utara / Aleutian Ridge Volcanic Arc
- Ketinggian
- 2857 m
- Koordinat
- 54.756, -163.970
- Letusan terakhir
- 2023
- Kondisi tektonik
- Zona subduksi / Kerak benua (> 25 km)
- Bentuk lahan
- Komposit
- Batuan utama
- Basal / Pikrobasal
Ringkasan geologi
The symmetrical glacier-covered Shishaldin in the Aleutian Islands is the westernmost of three large stratovolcanoes in the eastern half of Unimak Island. The Aleuts named the volcano Sisquk, meaning "mountain which points the way when I am lost." Constructed atop an older glacially dissected edifice, it is largely basaltic in composition. Remnants of an older edifice are exposed on the W and NE sides at 1,500-1,800 m elevation. There are over two dozen pyroclastic cones on its NW flank, which is covered by massive aa lava flows. Frequent explosive activity, primarily consisting of Strombolian ash eruptions from the small summit crater, but sometimes producing lava flows, has been recorded since the 18th century. A steam plume often rises from the summit crater.
Ringkasan Wikipedia
Ringkasan InggrisShishaldin Volcano, or Mount Shishaldin, is one of six active volcanoes on Unimak Island in the eastern Aleutian Islands of Alaska. It is the highest mountain peak of the Aleutian Islands, rising to a height of 9,373 ft (2,857 m) above sea level. It is located within Alaska Maritime National Wildlife Refuge. Shishaldin's magma supply is generated via flux melting above the Aleutian Trench, where the Pacific Plate subducts beneath the North American Plate. Due to its remote location and frequently inclement weather, the Alaska Volcano Observatory (AVO) monitors the volcano remotely via satellite and a seismic network deployed in 1997. Shishaldin is one of the most active volcanoes in the Aleutian Islands, with 40 confirmed eruptions in the last 11,700 years. Notably, Shishaldin produced a sub-Plinian eruption in 1999.
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Riwayat letusan
51 tercatatGlosariumGaris waktu rinci
- 2023VEI 3Teramati2023-07-11 – 2023-11-03
- 2019VEI 3Teramati2019-07-23 – 2020-05-04Summit crater
- 2014VEI 1Teramati2014-01-30 – 2015-07-03Summit crater
- 2008VEI 1Metode tidak dinyatakan2008-02-12 – 2008-02-12
- 2004VEI 2Teramati2004-02-17 – 2004-07-16
- 2000VEI 1Metode tidak dinyatakan2000-08-11 – akhir tidak diketahuiSummit
- 1999VEI 3Teramati1999-03-13 – 1999-05-27
- 1999VEI 1Metode tidak dinyatakan1999-09-25 – 2000-02-04
- 1998VEI 1Teramati1998-11-04 – 1998-11-04
- 1997VEI 1Teramati1997-06-02 – 1997-06-02
- 1995VEI 3Teramati1995-12-23 – 1996-05-16
- 1993VEI 2Teramati1993-09-04 – 1993-10-29
- 1986VEI 2Teramati1986-03-19 – 1987-02-15
- 1981VEI ?Metode tidak dinyatakan1981-09-25 – akhir tidak diketahui
- 1979VEI 2Teramati1979-02-16 – akhir tidak diketahui
- 1978VEI 2Teramati1978-02-08 – 1978-02-09
- 1976VEI 2Teramati1976-01-16 – 1976-09-28
- 1975VEI 2Teramati1975-09-13 – 1975-10-26
- 1967VEI 2Teramati1967-01-28 – akhir tidak diketahui
- 1963VEI 2Teramati1963-12-28 – akhir tidak diketahui
- 1955VEI 2Teramati1955-07-16 – akhir tidak diketahui
- 1953VEI 2Teramati1953-10-04 – akhir tidak diketahui
- 1951VEI 2Teramati1951-04-16 – 1951-10-05
- 1948VEI 2Teramati1948-07-02 – akhir tidak diketahui
- 1946VEI 2Teramati1946-08-16 – 1947-01-16
- 1932VEI 2Teramati1932-02-01 – 1932-05-21
- 1929VEI 2Teramati1929-05-28 – 1929-06-23Summit and north flank
- 1928VEI 2Teramati1928-08-16 – akhir tidak diketahui
- 1927VEI ?Teramati1927-07-02 – akhir tidak diketahui
- 1925VEI ?Teramati1925-07-02 – akhir tidak diketahui
- 1922VEI 2Teramati1922-10-15 – akhir tidak diketahui
- 1912VEI ?Metode tidak dinyatakan1912-07-02 – akhir tidak diketahui
- 1901VEI ?Teramati1901-07-02 – akhir tidak diketahui
- 1899VEI ?Metode tidak dinyatakan1899-07-02 – akhir tidak diketahui
- 1898VEI 2Teramati1898-07-02 – akhir tidak diketahui
- 1897VEI ?Metode tidak dinyatakan1897-07-02 – akhir tidak diketahui
- 1883VEI 2Teramati1883-07-02 – akhir tidak diketahui
- 1880VEI ?Metode tidak dinyatakan1880-07-02 – 1881-07-02
- 1865VEI ?Metode tidak dinyatakan1865-07-02 – akhir tidak diketahui
- 1842VEI 2Teramati1842-07-02 – akhir tidak diketahui
- 1838VEI 2Teramati1838-07-02 – akhir tidak diketahui
- 1830VEI 3Teramati1830-11-16 – 1831-03-16
- 1827VEI 2Teramati1827-07-02 – 1829-07-02
- 1826VEI 0Teramati1826-07-02 – akhir tidak diketahui
- 1825VEI 2Teramati1825-07-02 – akhir tidak diketahuiNE flank (1300 m)
- 1824VEI 3Teramati1824-07-02 – akhir tidak diketahui
- 1790VEI ?Metode tidak dinyatakan1790 – akhir tidak diketahui
- 1775VEI ?Metode tidak dinyatakan1775 – 1778
- 950VEI ?Perkiraan geologi950 – akhir tidak diketahui
- 7050 SMVEI ?Perkiraan geologi7050 SM – akhir tidak diketahui
- 7550 SMVEI ?Perkiraan geologi7550 SM – akhir tidak diketahui
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