Shishaldin Volcano
Updated: 25 abr. 2024 03:44 GMT -
Stratovolcano 2857 m / 9,373 ft
Aleutian Islands, Alaska, 54.76°N / -163.97°W
Current status: restless (2 out of 5)
Aleutian Islands, Alaska, 54.76°N / -163.97°W
Current status: restless (2 out of 5)
Last update: 21 feb 2024 (Smithsonian / USGS Weekly Volcanic Activity Report)
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Erupciones del volcán Shishaldin: 2023 (Jul 12-ongoing), 2019 (Jul 23 - 2020 May 4), 2014-15, 2008 (?), 2004, 2002, 2000, 1999, 1997, 1995, 1993, 1986-87, 1981 (?), 1979, 1978, 1976, 1975, 1967, 1963, 1955, 1953, 1951, 1948, 1946-47, 1932, 1929, 1928, 1927, 1925, 1922, 1912 (?), 1901, 1899 (?), 1898, 1897 (?), 1883, 1880-81, 1865 (?), 1842, 1838, 1830, 1927-29, 1826, 1825, 1824, 1790 (?), 1775-78
Latest nearby earthquakes
Fecha / Hora | Revista / Prof. | Distancia / Ubicación | |||
19 abr 01:55 (Anchorage) | 0.8 8 km | 36 km WSW of False Pass, Alaska | Más | ||
domingo, 14 abril 2024 GMT (2 sismos) | |||||
14 abr 15:42 (Anchorage) | 0.3 13 km | 40 km W of False Pass, Alaska | Más | ||
14 abr 09:42 (Anchorage) | 0.4 12 km | 33 km WSW of False Pass, Alaska | Más | ||
sábado, 13 abril 2024 GMT (1 sismo) | |||||
12 abr 20:23 (Anchorage) | 1.3 19 km | 4.9 km al noreste | 32 km WSW of False Pass, Alaska | Más | |
jueves, 11 abril 2024 GMT (1 sismo) | |||||
11 abr 01:42 (Anchorage) | 1.6 0.8 km | 19 km al oeste | 56 km W of False Pass, Alaska | Más |
Background
The beautifully symmetrical volcano of Shishaldin is the highest and one of the most active volcanoes of the Aleutian Islands. The 2857-m-high, glacier-covered volcano is the westernmost of three large stratovolcanoes along an E-W line in the eastern half of Unimak Island. The Aleuts named the volcano Sisquk, meaning "mountain which points the way when I am lost." A steady steam plume rises from its small summit crater. Constructed atop an older glacially dissected volcano, Shishaldin is Holocene in age and largely basaltic in composition. Remnants of an older ancestral volcano are exposed on the west and NE sides at 1500-1800 m elevation. Shishaldin contains over two dozen pyroclastic cones on its NW flank, which is blanketed 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.---
Smithsonian / GVP volcano information
Shishaldin Volcano Photos
La cadena de volcanes del Unimak, de izquierda a derecha: Roundtop Mountain, Isanotski, Pogromni y Shishaldin. (Photo: marcofulle)
A excepción de la parte superior, los flancos superiores de Shishaldin están cubiertos de glaciares. Su rápido flujo conduce a intensas grietas. (Photo: marcofulle)
El cono perfecto del volcán Shishaldin se eleva por encima de una plataforma de nubes estratocúmulos. Volcán Pogromni en el extremo derecho. (Photo: marcofulle)
Mientras que Shishaldin es un magnífico ejemplo de estratovolcán joven y simétrico, el Isanotski, mucho más antiguo, es irregular y profundamente erosionado. (Photo: marc...