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Aniakchak ηφαίστειο

Τελευταία ανανενώση: 6 Δεκεμβρίου 2022 18:39 GMT -
Caldera 1341 m / 4,400 ft
United States, Alaska Peninsula, 56.88°N / -158.17°W
Current status: normal or dormant (1 out of 5)
Last update: 6 Jul 2022 (Smithsonian / USGS Weekly Volcanic Activity Report)

Διαδραστικός χάρτης
Typical eruption style: δεν έχει καθοριστεί
Aniakchak ηφαίστειο εκρήξεις: 1931 

Latest nearby earthquakes

ΏραMag. / ΒάθοςΑπόσταση/Τοποθεσία
Τετάρτη, 30 Νοεμβρίου 2022 GMT (1 σεισμός)
30 Νοε 2022 04:52 (GMT -9) (30 Νοε 2022 13:52 GMT)
0.1

16 km
6.1 km (3.8 mi)
34 Km ESE of Port Heiden, Alaska
Δευτέρα, 28 Νοεμβρίου 2022 GMT (1 σεισμός)
27 Νοε 2022 19:30 (GMT -9) (28 Νοε 2022 04:30 GMT)
2.2

31 km
25 km (16 mi)
53 km ανατολικά από Port Heiden, Lake and Peninsula, Αλάσκα, Ηνωμένες Πολιτείες

Background

One of the most dramatic calderas of the Aleutian arc, the 10-km-wide Aniakchak caldera was formed around 3400 years ago during a voluminous eruption in which pyroclastic flows traveled more than 50 km north to the Bering Sea and also reached the Pacific Ocean to the south. At least 40 explosive eruptions have been documented from Aniakchak during the past 10,000 years, making it the most active volcano of the eastern Aleutian arc. A dominantly andesitic pre-caldera volcano was constructed above basement Mesozoic and Tertiary sedimentary rocks that are exposed in the caldera walls to elevations of about 610 m. The ice-free caldera floor contains many pyroclastic cones, tuff cones, maars, and lava domes. Surprise Lake on the NE side drains through The Gates, a steep-walled breach on the east side of the 1-km-high caldera rim. Vent Mountain and Half Cone are two long-lived vents on the south-central and NW caldera floor, respectively. The first and only confirmed historical eruption took place in 1931 from vents on the west and SW caldera floor.
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Smithsonian / GVP volcano information


See also: Sentinel hub | Landsat 8 | NASA FIRMS
Wed, 6 Jul 2022, 14:00

Aniakchak volcano (Alaska Peninsula, Alaska) - Smithsonian / USGS Weekly Volcanic Activity Report for 29 June-5 July 2022 (Continuing Activity)

AVO reported that strong winds in a region NW of Aniakchak and E of Port Heiden resuspended ash and blew it NW on 30 June. A dense cloud of possible resuspended ash near ground levels was identified in Port Heiden webcam views. The altitude of the cloud was unknown, though the report noted that resuspended ash clouds typically do not rise above 5 km (16,400 ft) a.s.l. ... Read all
Thu, 30 Jun 2022, 10:00

Aniakchak volcano (Alaska Peninsula, Alaska) - Smithsonian / USGS Weekly Volcanic Activity Report for 29 June-5 July 2022 (Continuing Activity)

AVO reported that strong winds in a region NW of Aniakchak and E of Port Heiden resuspended ash and blew it NW on 30 June. A dense cloud of possible resuspended ash near ground levels was identified in Port Heiden webcam views. The altitude of the cloud was unknown, though the report noted that resuspended ash clouds typically do not rise above 5 km (16,400 ft) a.s.l. ... Read all
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