Amerika Serikat · Kubah lava
Gunung berapi Augustine
Augustine
- Tipe
- Kubah lava
- Ketinggian
- 1218 m
- Letusan terakhir
- 2006
- Tipe
- Kubah lava
- Negara
- Amerika Serikat
- Wilayah
- Amerika Utara / Alaska Peninsula Volcanic Arc
- Ketinggian
- 1218 m
- Koordinat
- 59.363, -153.435
- Letusan terakhir
- 2006
- Kondisi tektonik
- Zona subduksi / Kerak benua (> 25 km)
- Bentuk lahan
- Komposit
- Batuan utama
- Andesit / Andesit basaltik
Ringkasan geologi
Augustine volcano, rising above Kamishak Bay in the southern Cook Inlet about 290 km SW of Anchorage, is the most active volcano of the eastern Aleutian arc. It consists of a complex of overlapping summit lava domes surrounded by an apron of volcaniclastic debris that descends to the sea on all sides. Few lava flows are exposed; the flanks consist mainly of debris-avalanche and pyroclastic-flow deposits formed by repeated collapse and regrowth of the summit. The latest episode of edifice collapse occurred during Augustine's large 1883 eruption; subsequent dome growth has restored the edifice to a height comparable to that prior to 1883. The oldest dated volcanic rocks on Augustine are more than 40,000 years old. At least 11 large debris avalanches have reached the sea during the past 1,800-2,000 years, and five major pumiceous tephras have been erupted during this interval. Recorded eruptions have typically consisted of explosive activity with emplacement of pumiceous pyroclastic-flow deposits followed by lava dome extrusion with associated block-and-ash flows.
Ringkasan Wikipedia
Ringkasan InggrisAugustine Volcano is a stratovolcano in Alaska consisting of a central complex of summit lava domes and flows surrounded by an apron of pyroclastic, lahar, avalanche, and ash deposits. The volcano forms Augustine Island, colloquially called Mount St. Augustine, in southwestern Cook Inlet in the Kenai Peninsula Borough of southcentral coastal Alaska, about 70 miles (113 km) west of Homer and about 175 miles (282 km) southwest of Anchorage.
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Riwayat letusan
22 tercatatGlosariumGaris waktu rinci
- 2005VEI 3Teramati2005-12-09 – 2006-04-27
- 1986VEI 4Teramati1986-03-27 – 1986-08-31
- 1976VEI 4Teramati1976-01-22 – 1977-05-14
- 1971VEI 1Teramati1971-10-07 – 1971-10-08
- 1963VEI 2Teramati1963-10-11 – 1964-08-19
- 1935VEI 3Teramati1935-03-13 – 1935-08-18
- 1908VEI 1Teramati1908-07-02 – akhir tidak diketahui
- 1883VEI 4Teramati1883-10-06 – 1884-07-02
- 1812VEI 3Teramati1812-07-02 – akhir tidak diketahui
- 1650 (±100 tahun)VEI ?Perkiraan geologi1650 – akhir tidak diketahui
- 1540 (±100 tahun)VEI 4Perkiraan geologi1540 – akhir tidak diketahui
- 1230 (±50 tahun)VEI ?Perkiraan geologi1230 – akhir tidak diketahui
- 930 (±150 tahun)VEI ?Perkiraan geologi930 – akhir tidak diketahui
- 570 (±150 tahun)VEI ?Perkiraan geologi570 – akhir tidak diketahui
- 340 (±40 tahun)VEI ?Perkiraan geologi340 – akhir tidak diketahui
- 120 SM (±40 tahun)VEI ?Perkiraan geologi120 SM – akhir tidak diketahui
- 310 SM (±100 tahun)VEI ?Perkiraan geologi310 SM – akhir tidak diketahui
- 350 SM (±200 tahun)VEI ?Perkiraan geologi350 SM – akhir tidak diketahui
- 1820 SM (±300 tahun)VEI ?Perkiraan geologi1820 SM – akhir tidak diketahui
- 2040 SM (±300 tahun)VEI ?Perkiraan geologi2040 SM – akhir tidak diketahui
- 4150 SM (±100 tahun)VEI ?Perkiraan geologi4150 SM – akhir tidak diketahui
- 5420 SM (±50 tahun)VEI ?Perkiraan geologi5420 SM – akhir tidak diketahui
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