Stati Uniti · Stratovulcano
Vulcano Amukta
Amukta
- Tipo
- Stratovulcano
- Altitudine
- 1066 m
- Ultima eruzione
- 1996
- Tipo
- Stratovulcano
- Paese
- Stati Uniti
- Regione
- Nord America / Aleutian Ridge Volcanic Arc
- Altitudine
- 1066 m
- Coordinate
- 52.500, -171.252
- Ultima eruzione
- 1996
- Contesto tettonico
- Zona di subduzione / Crosta intermedia (15-25 km)
- Forma vulcanica
- Composito
- Roccia principale
- Andesite / Andesite basaltica
Sintesi geologica
The symmetrical Amukta stratovolcano lies in the central Aleutians SW of Chagulak Island and is the westernmost of the Islands of the Four Mountains group. The stratovolcano was constructed at the northern side of an arcuate caldera-like feature that is open to the sea along the southern coast of the 8-km-wide Amukta Island. It overlies a broad shield volcano and is topped by a 400-m-wide crater, and a cinder cone is located near the NE coast. There have been several reported eruptions from both summit and flank vents.
Sintesi da Wikipedia
Riassunto in ingleseThe undissected stratovolcano of Amukta volcano makes up most of nearly circular, 7.7-km-wide Amukta Island. It is the westernmost of the Islands of Four Mountains chain. The nearest islands to it are Yunaska and Seguam Island; it is separated from Seguam Island by Amukta Pass. The cone, about 5.8 km in basal diameter and topped by a 0.4 km wide summit crater, appears on synthetic-aperture radar imagery to be built upon a 300+ meter high, east-west trending arcuate ridge.
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Storia delle eruzioni
8 registrateGlossarioCronologia dettagliata
- 1997VEI 1Osservata1997-03-03 – fine sconosciuta
- 1996VEI 1Osservata1996-09-17 – 1996-09-18
- 1987VEI 1Osservata1987-09-04 – 1987-09-04
- 1963VEI 3Osservata1963-02-13 – fine sconosciuta
- 1878VEI ?Osservata1878-07-02 – fine sconosciuta
- 1876VEI ?Metodo non indicato1876-07-02 – fine sconosciuta
- 1786VEI 3Osservata1786-06 – 1791
- 1770VEI ?Metodo non indicato1770 – fine sconosciuta
Vulcani nelle vicinanze
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⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.