Atka volcan

Stratovolcanoes 1451 m / 4,760 ft
United States, Aleutian Islands, 52.33°N / -174.14°W
Condition actuelle: normal / en sommeil (1 sur 5)
Last update: 27 août 2021 (Volcanic Alert Level lowered to Green)

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Style éruptif tipique: unspecified
Eruptions du volcan Atka: 1987 

No recent earthquakes
HeureMag. / ProfondeurDistance/Lieu

Introduction

The largest volcanic center in the central Aleutians, Atka consists of a central shield and Pleistocene caldera with several post-caldera volcanoes. A major dacitic explosive eruption accompanied formation of the caldera about 500,000 to 300,000 years ago. The most prominent of the post-caldera stratovolcanoes are Kliuchef and Sarichef, both of which may have been active in historical time. Sarichef has a symmetrical profile, but the less eroded Kliuchef is the source of most if not all historical eruptions. Kliuchef may have been active on occasion simultaneously with Korovin volcano to the north. Hot springs and fumaroles are located on the flanks of Mount Kliuchef and in a glacial valley SW of Kliuchef.
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Smithsonian / GVP volcano information

Atka Photos

The crater lake of Maly Semyachik, Kamchatka (Photo: kaylash)
The crater lake of Maly Semyachik, Kamchatka (Photo: kaylash)
The Malia Vgethi lava dome atKameni Chora village on Methana. (Photo: Tobias Schorr)
The Malia Vgethi lava dome atKameni Chora village on Methana. (Photo: Tobias Schorr)
 



See also: Sentinel hub | Landsat 8 | NASA FIRMS
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