Snowy Mountain volcan

Stratovolcanoes 2162 m / 7,093 ft

Condition actuelle: normal / en sommeil (1 sur 5)

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Style éruptif tipique: unspecified
Eruptions du volcan Snowy Mountain: 1710 ± 200 years

HeureMag. / ProfondeurDistance/Lieu
vendredi, 15. octobre 2021 20:09 GMT (1 séisme)
15 oct. 2021 12:09 (GMT -8) (15. oct. 2021 20:09 GMT)
1.8

81 km
32 km (20 mi)
76 Km NNE of Karluk, Alaska
mercredi, 13. octobre 2021 03:01 GMT (1 séisme)
12 oct. 2021 19:01 (GMT -8) (13. oct. 2021 03:01 GMT)
1.7

77 km
40 km (25 mi)
69 Km WNW of Aleneva, Alaska
lundi, 11. octobre 2021 00:16 GMT (1 séisme)
10 oct. 2021 16:16 (GMT -8) (11. oct. 2021 00:16 GMT)
2.8

8.5 km
25 km (16 mi)
Arrondissement de Kodiak Island Parish, 139 km à l'ouest de Kodiak, Alaska, États-Unis
jeudi, 7. octobre 2021 04:58 GMT (1 séisme)
6 oct. 2021 20:58 (GMT -8) (7. oct. 2021 04:58 GMT)
1.6

91 km
36 km (22 mi)
87 Km WNW of Aleneva, Alaska
mardi, 5. octobre 2021 04:26 GMT (1 séisme)
4 oct. 2021 20:26 (GMT -8) (5. oct. 2021 04:26 GMT)
3.4

130 km
45 km (28 mi)
90 Km S of Kokhanok, Alaska

Introduction

Glacier-covered, 2161-m-high Snowy Mountain, located 15 km NE of Mount Katmai, is the SW-most of a chain of closely spaced volcanoes extending NE along the crest of the Alaska Range. More than 90% of the compound Snowy volcano is mantled by glacial ice, which prompted the naming of the volcano by members of the 1917 Katmai expedition. Two small andesitic-dacitic stratovolcanoes, SW Snowy and NE Snowy, originated about 200,000 years ago. Only NE Snowy has been active during the Holocene. Late-Holocene collapse of this volcano produced a large debris avalanche that traveled to the north and left a large breached crater inside which a blocky lava dome was constructed. Peat beneath an ash layer thought to be associated with the the lava dome was radiocarbon dated at about 250 +/- 70 years ago. No historical eruptive activity has been documented, but fumarolic activity has been observed at NE Snowy. A zone of persistent diffuse shallow seismicity is located on and NW of the volcano.
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Smithsonian / GVP volcano information


See also: Sentinel hub | Landsat 8
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