Black Peak Volcano
Updated: 24 avril. 2024 21:23 GMT -
Stratovolcano 1032 m / 3,386 ft
United States, Alaska Peninsula, 56.55°N / -158.79°W
Condition actuelle: normal / en sommeil (1 sur 5)
United States, Alaska Peninsula, 56.55°N / -158.79°W
Condition actuelle: normal / en sommeil (1 sur 5)
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Eruptions du volcan Black Peak: 1900 BC ± 150 years
Derniers séismes proches
Heure | Mag. / Profondeur | Distance / Lieu | |||
18 avril 14:07 (Anchorage) | 0.4 8.5 km | 30 km au sud-ouest | 15 km WNW of Chignik Lake, Alaska | Info | |
lundi, 15 avril 2024 GMT (1 séisme) | |||||
15 avril 03:09 (Anchorage) | 0.5 7 km | 27 km au sud-ouest | 17 km WNW of Chignik Lake, Alaska | Info |
Introduction
The highly eroded stratovolcano and lava dome complex of Black Peak was constructed within an ice-free mid-Holocene caldera with two small caldera lakes on the northern and eastern sides. The pre-caldera volcano consists of andesitic-dacitic lava domes, lava flows, and volcaniclastic rocks that were constructed over a basement of Pliocene volcanogenic sedimentary rocks. Ash-flow tuffs and block-and-ash-flow deposits from the >10 cu km caldera-forming eruption, which occurred less than about 4000 years ago, fill the Ash Creek and Bluff Creek valleys to the west and north to depths of as much as 100 m. Most of the 3.5-km-wide caldera floor is occupied by a complex of nested dacitic lava domes and associated lava flows centered in the southern part of the caldera.---
Smithsonian / GVP volcano information
Black Peak Volcano Photos
La vie et la lave (Photo: Tom Pfeiffer)
Chat noir de Nisyros (Photo: Tom Pfeiffer)
Multiples miroirs formés de galets. (c)
Waves a frappé la plage de galets de la plage de Vlyhada (Photo: Tobias Schorr)