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Chiginagak volcan

Mise à jour: 9 févr.. 2023 12:25 GMT -
Stratovolcano 2221 m / 7,287 ft
United States, Alaska Peninsula, 57.14°N / -156.99°W
Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 13 déc. 2021 (Smithsonian / USGS Weekly Volcanic Activity Report)

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Style éruptif tipique: unspecified
Eruptions du volcan Chiginagak: 1998 

Derniers séismes proches

HeureMag. / ProfondeurDistance/Lieu
lundi, 6 février 2023 GMT (1 séisme)
6 févr. 2023 09:22 (GMT -9) (6 févr.. 2023 18:22 GMT)
2.2

98 km
18 km (11 mi)
84 km à l'est de Port Heiden, Arrondissement de Lake and Peninsula, Alaska, États-Unis
samedi, 28 janvier 2023 GMT (2 séismes)
28 janv. 2023 12:02 (GMT -9) (28 janv.. 2023 21:02 GMT)
2.1

3.6 km
25 km (16 mi)
46 km au sud de Ugashik, Arrondissement de Lake and Peninsula, Alaska, États-Unis
28 janv. 2023 00:39 (GMT -9) (28 janv.. 2023 09:39 GMT)
2.6

4.4 km
25 km (16 mi)
78 km à l'est de Port Heiden, Arrondissement de Lake and Peninsula, Alaska, États-Unis

Introduction

The symmetrical, calc-alkaline Chiginagak stratovolcano located about 15 km NW of Chiginagak Bay contains a small summit crater, which is breached to the south, and one or more summit lava domes. Satellitic lava domes occur high on the NW and SE flanks of the glacier-mantled volcano. An unglaciated lava flow and an overlying pyroclastic-flow deposit extending east from the summit are the most recent products of Chiginagak. They most likely originated from a lava dome at 1687 m on the SE flank, 1 km from the summit of the volcano, which has variably been estimated to be from 2075 to 2221 m high. Brief ash eruptions were reported in July 1971 and August 1998. Fumarolic activity occurs at 1600 m elevation on the NE flank of the volcano, and two areas of hot-spring travertine deposition are located at the NW base of the volcano near Volcano Creek.
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Smithsonian / GVP volcano information


See also: Sentinel hub | Landsat 8 | NASA FIRMS
Actualités
mer., 24 août 2005, 06:00

Chiginagak volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 24 August-30 August 2005 (New Activity / Unrest)

AVO reported that a 400-m-wide "melt-water lake" formed in the snow-and-ice filled summit crater of Chiginagak sometime after the previous observation in August 2004. Earlier this summer, the southern crater rim of Chiginagak was breached, allowing a portion of the lake to drain. The resulting lahar left a deposit on a glacier draining the crater to the S and caused flooding of 1-2 m above normal at Indecision Creek. ... Read all
Actualités
mer., 24 août 2005, 06:00

Chiginagak volcano (United States) - Smithsonian / USGS Weekly Volcanic Activity Report for 24 August-30 August 2005 (New Activity / Unrest)

AVO reported that a 400-m-wide "melt-water lake" formed in the snow-and-ice filled summit crater of Chiginagak sometime after the previous observation in August 2004. Earlier this summer, the southern crater rim of Chiginagak was breached, allowing a portion of the lake to drain. The resulting lahar left a deposit on a glacier draining the crater to the S and caused flooding of 1-2 m above normal at Indecision Creek. ... Read all
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