Amerika Serikat · Stratovolkan
Mount Vsevidof
Vsevidof
- Tipe
- Stratovolkan
- Ketinggian
- 2160 m
- Letusan terakhir
- 1878
- Tipe
- Stratovolkan
- Negara
- Amerika Serikat
- Wilayah
- Amerika Utara / Aleutian Ridge Volcanic Arc
- Ketinggian
- 2160 m
- Koordinat
- 53.126, -168.688
- Letusan terakhir
- 1878
- Kondisi tektonik
- Zona subduksi / Kerak menengah (15-25 km)
- Bentuk lahan
- Komposit
- Batuan utama
- Andesit / Andesit basaltik
Ringkasan geologi
The symmetrical Vsevidof stratovolcano, near the SW end of Umnak Island, contains a 1.2-km-wide, ice-filled summit crater that is breached by glaciers on the E and N sides. An E-W-trending zone of scoria cones that extends down much of the W flank has been the source of recorded eruptions. Most of the cone was constructed during the Holocene. Andesitic and dacitic lava flows originated from vents on the N and S flanks, and on the W-flank rift. The largest lava flow traveled down the W flank to the coast, forming Cape Kigushimkada.
Ringkasan Wikipedia
Ringkasan InggrisMount Vsevidof is a stratovolcano in the U.S. state of Alaska. Its summit is the highest point on Umnak Island, one of the eastern Aleutian Islands. Its symmetrical cone rises abruptly from its surroundings. The base of the volcano is around 10 km (6 mi) wide, steepening from about 15 degrees at 300 m (980 ft) altitude to around 30 degrees near the summit. Some glacial tongues have cut through narrow canyons up to 120 m (390 ft) deep, due to ice filling the crater and extending down the north and east flanks of the cone. It is most likely that Mount Vsevidof has not erupted in historic time. Reports of its latest eruption in 1957 is considered questionable by the Alaska Volcano Observatory. This also includes possible eruptions or activity which may have occurred at the volcano in 1784, 1790, 1830, 1878, and 1880.
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Riwayat letusan
7 tercatatGlosariumGaris waktu rinci
- 1957VEI 2Metode tidak dinyatakan1957-03-11 – 1957-03-12West flank fissure
- 1880VEI ?Metode tidak dinyatakan1880-07-02 – akhir tidak diketahui
- 1878VEI 2Teramati1878-07-02 – akhir tidak diketahuiWest flank fissure ?
- 1830VEI ?Teramati1830-07-02 – akhir tidak diketahuiSW end of Umnak Island
- 1817VEI 3Teramati1817-07-02 – akhir tidak diketahui
- 1790VEI ?Metode tidak dinyatakan1790-05-30 – akhir tidak diketahui
- 1784VEI ?Metode tidak dinyatakan1784 – akhir tidak diketahui
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