Does a Caldera Form the Islands of the Four Mountains, Alaska?

Islands of the Four Mountains with volcanoes named.  Image courtesy Quantum Spatial Photo, via Power, et al, Dec 2020 via Volcano Discovery

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The Atka, Korovin, Kliuchef Volcanic Complex, Aleutians, Alaska

Greater Atka Volcano complex with the caldera, Korovin and Kliuchef labeled. Image courtesy Lu and Dzurisin, 2014, via Smithsonian GVP

Bogoslof Update – August 2018

AVO survey team returning to ship following a day of investigation of Bogoslof August 2018. Newly formed dome is at left, with still active fumaroles. 1926 – 1927 dome in in the center. 1992 dome is to the right. Photo courtesy Gabrielle Tepp, AVO. https://avo.alaska.edu/images/image.php?id=127351

Ongoing eruptions at Bogoslof Volcano Eruption of December 2016 – January 2017

Initial plume from Bogoslof on Dec. 20, 2016. Photo courtesy AVO via NYT. http://www.nytimes.com/2016/12/30/science/an-alaskan-volcano-bogoslof-erupts-largely-out-of-view.html?ref=oembed&_r=0

Tectonics of the Kamchatka Peninsula

Kliuchevskoi volcano group in eruption, Nov. 16, 2013 – http://www.slate.com/blogs/bad_astronomy/2013/12/04/volcanoes_from_space_two_eruptions_seen_from_the_iss.html