Augustine volcano

Updated: Jul 6, 2022 11:47 GMT - Refresh
Stratovolcano 1260 m / 4134 ft
Cook Inlet (SW Alaska), 59.36°N / -153.43°W
Current status: normal or dormant (1 out of 5)
Last update: 10 Dec 2021
Augustine volcano (image: Peter Kelly, AVO/USGS)
Augustine volcano (image: Peter Kelly, AVO/USGS)

Augustine is the most active volcano of the eastern Aleutian arc. It consists of several overlapping lava domes that frequently produce explosive eruptions and are notorious for collapsing, producing glowing avalanches (block and ash flows).
Augustine volcano had a devastating eruption 1883 when large parts of the summit dome complex collapsed. In the following century, several eruptions associated with dome growth have restored the volcano's height again. Historical eruptions after that date were typically explosive, producing pyroclastic pumice flows and block-and-ash flows, followed by regrowth of the lava domes.

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Typical eruption style: Explosive
Augustine volcano eruptions: 2005-06, 1986, 1976, 1971, 1963, 1935, 1908(?), 1883-84(?), 1812
Lastest nearby earthquakes:
TimeMag. / DepthDistance/Location
Tuesday, June 28, 2022 GMT (1 quake)
Jun 28, 2022 8:59 am (GMT -8) (Jun 28, 2022 16:59 GMT)
1.5

117 km
25 km (16 mi)
50 Km SE of Pope-Vannoy Landing, Alaska

Background

The oldest exposed rocks on the flanks of Augustine are little more than 40,000 years old. At least 11 large debris avalanches have reached the sea during the past 1800-2000 years, and five major pumiceous tephras have been erupted during this interval.


See also: Sentinel hub | Landsat 8 | NASA FIRMS

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