Estados Unidos · Estratovolcán
Monte Shishaldin
Shishaldin
- Tipo
- Estratovolcán
- Altitud
- 2857 m
- Última erupción
- 2023
- Tipo
- Estratovolcán
- País
- Estados Unidos
- Región
- América del Norte / Aleutian Ridge Volcanic Arc
- Altitud
- 2857 m
- Coordenadas
- 54.756, -163.970
- Última erupción
- 2023
- Contexto tectónico
- Zona de subducción / Corteza continental (> 25 km)
- Forma volcánica
- Compuesto
- Roca principal
- Basalto / Picrobasalto
Resumen geológico
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.
Resumen de Wikipedia
Resumen en inglésShishaldin 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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Historial de erupciones
51 registradasGlosarioLínea de tiempo detallada
- 2023VEI 3Observado2023-07-11 – 2023-11-03
- 2019VEI 3Observado2019-07-23 – 2020-05-04Summit crater
- 2014VEI 1Observado2014-01-30 – 2015-07-03Summit crater
- 2008VEI 1Método no indicado2008-02-12 – 2008-02-12
- 2004VEI 2Observado2004-02-17 – 2004-07-16
- 2000VEI 1Método no indicado2000-08-11 – fin desconocidoSummit
- 1999VEI 3Observado1999-03-13 – 1999-05-27
- 1999VEI 1Método no indicado1999-09-25 – 2000-02-04
- 1998VEI 1Observado1998-11-04 – 1998-11-04
- 1997VEI 1Observado1997-06-02 – 1997-06-02
- 1995VEI 3Observado1995-12-23 – 1996-05-16
- 1993VEI 2Observado1993-09-04 – 1993-10-29
- 1986VEI 2Observado1986-03-19 – 1987-02-15
- 1981VEI ?Método no indicado1981-09-25 – fin desconocido
- 1979VEI 2Observado1979-02-16 – fin desconocido
- 1978VEI 2Observado1978-02-08 – 1978-02-09
- 1976VEI 2Observado1976-01-16 – 1976-09-28
- 1975VEI 2Observado1975-09-13 – 1975-10-26
- 1967VEI 2Observado1967-01-28 – fin desconocido
- 1963VEI 2Observado1963-12-28 – fin desconocido
- 1955VEI 2Observado1955-07-16 – fin desconocido
- 1953VEI 2Observado1953-10-04 – fin desconocido
- 1951VEI 2Observado1951-04-16 – 1951-10-05
- 1948VEI 2Observado1948-07-02 – fin desconocido
- 1946VEI 2Observado1946-08-16 – 1947-01-16
- 1932VEI 2Observado1932-02-01 – 1932-05-21
- 1929VEI 2Observado1929-05-28 – 1929-06-23Summit and north flank
- 1928VEI 2Observado1928-08-16 – fin desconocido
- 1927VEI ?Observado1927-07-02 – fin desconocido
- 1925VEI ?Observado1925-07-02 – fin desconocido
- 1922VEI 2Observado1922-10-15 – fin desconocido
- 1912VEI ?Método no indicado1912-07-02 – fin desconocido
- 1901VEI ?Observado1901-07-02 – fin desconocido
- 1899VEI ?Método no indicado1899-07-02 – fin desconocido
- 1898VEI 2Observado1898-07-02 – fin desconocido
- 1897VEI ?Método no indicado1897-07-02 – fin desconocido
- 1883VEI 2Observado1883-07-02 – fin desconocido
- 1880VEI ?Método no indicado1880-07-02 – 1881-07-02
- 1865VEI ?Método no indicado1865-07-02 – fin desconocido
- 1842VEI 2Observado1842-07-02 – fin desconocido
- 1838VEI 2Observado1838-07-02 – fin desconocido
- 1830VEI 3Observado1830-11-16 – 1831-03-16
- 1827VEI 2Observado1827-07-02 – 1829-07-02
- 1826VEI 0Observado1826-07-02 – fin desconocido
- 1825VEI 2Observado1825-07-02 – fin desconocidoNE flank (1300 m)
- 1824VEI 3Observado1824-07-02 – fin desconocido
- 1790VEI ?Método no indicado1790 – fin desconocido
- 1775VEI ?Método no indicado1775 – 1778
- 950VEI ?Estimación geológica950 – fin desconocido
- 7050 a. C.VEI ?Estimación geológica7050 a. C. – fin desconocido
- 7550 a. C.VEI ?Estimación geológica7550 a. C. – fin desconocido
Volcanes cercanos
Enlaces externos
⚠ Solo como referencia. No apto para respuesta ante emergencias.