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Griggs Volcano

Updated: 28 mar. 2024 09:59 GMT -
Stratovolcano 2317 m / 7,602 ft
United States, Alaska Peninsula, 58.35°N / -155.09°W
Current status: normal or dormant (1 out of 5)

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Typical eruption style: unspecified
Erupciones del volcán Griggs: 1790 BC ± 40 years

Latest nearby earthquakes

Fecha / HoraRevista / Prof.Distancia / Ubicación
20 mar 09:54 (Anchorage)
20 mar 17:54 GMT
1.2

3.5 km
24 km al suroeste Estados Unidos, 179 km al oeste de Kodiak, Isla Kodiak, Alaska Más
lunes, 18 marzo 2024 GMT (2 sismos)
18 mar 05:31 (Anchorage)
18 mar 13:31 GMT
1.2

4 km
19 km al este Lake and Peninsula, Estados Unidos, 155 km al noroeste de Kodiak, Isla Kodiak, Alaska Más
17 mar 23:35 (Anchorage)
18 mar 07:35 GMT
0.7

2.2 km
14 km al sureste 82 km NNW of Karluk, Alaska Más
martes, 19 marzo 2024 GMT (2 sismos)
19 mar 01:08 (Anchorage)
19 mar 09:08 GMT
0.6

1.1 km
23 km al suroeste 85 km NW of Karluk, Alaska Más
18 mar 17:47 (Anchorage)
19 mar 01:47 GMT
0.6

0 km
23 km al suroeste 86 km NW of Karluk, Alaska Más
martes, 26 marzo 2024 GMT (1 sismo)
26 mar 00:17 (Anchorage)
26 mar 08:17 GMT
0.5

1.1 km
27 km al suroeste 87 km NW of Karluk, Alaska Más

Background

The summit of Mount Griggs towers above Knife Creek on the NE side of the Valley of Ten Thousand Smokes. The volcano is uniquely offset west of the NE-trending alignment of volcanoes in the Katmai area. The broad, 2317-m-high stratovolcano, formerly known as Knife Peak, consists of a late-Pleistocene volcano with glacial valleys on the north that was truncated on its SW side by an early Holocene edifice collapse. A Holocene volcano was subsequently constructed within the 1.5-km-wide scarp left by the emplacement of a large SW-flank debris avalanche. Nested cones with three concentric craters mostly fill the scarp, and thick, blocky lava flows blanket the SW flanks of the volcano below the collapse scarp. In contrast to the more silicic centers of the Katmai area along the crest of the range, lava flows from Griggs are dominantly andesitic in composition, and dacitic lava flows are uncommon. No historical eruptions have occurred from Griggs, but noisy fumarolic jets near the summit can be heard from the valley floor, 1750 m below.
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Smithsonian / GVP volcano information

Latest satellite images

griggs satellite image sat1griggs satellite image sat2

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