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Akademia Nauk Volcano | John Seach
(Karymsky Lake or Academii Nauk)
Kamchatka, Russia
53.98 N, 159.45 E
summit elevation 1180 m
Stratovolcanoes
Akademia Nauk Volcano is located in eastern Kamchatka, and forms part of Karymsky volcanic center.
1996 Eruption
The first historical eruption at the volcano occurred in 1996 and lasted one day. The subaqueous eruption in Karymsky lake began on 2nd January 1996 between 2 and 3:40 pm. The subaqueous eruption changed lake chemistry and biology of Karymsky Lake.
Prior to the 1996 eruption the lake had a pH of about 7 and was stocked with fish. After the eruption the chemistry changed from bicarbonate to sulphate and had high Na and K levels with a pH of 3.2. No fish survive in the lake. The lake is now the world's largest reservoir of acid water.
The 1996 eruption created Tokarev crater which is now separated from the lake.
Prior to the January 1996 eruption, Karymsky lake was a typical freshwater mountain lake in Kamchatka with a volume of about 0.35 cubic km. Kokanee fish was introduced into Karymsky lake in 1976. Their numbers had greatly increased by 1983.
Further reading
Muraviev, Ya D., et al. "Volcanic activity in the Karymsky center in 1996: Summit eruption at Karymsky and phreatomagmatic eruption in the Akademii Nauk Caldera." (1998).
Zobin, V.M. and Levina, V.I., 1998. Rupture history of the January 1, 1996, Ms 6.6 volcanic earthquake preceding the simultaneous eruption of Karymsky and Akademia Nauk volcanoes in Kamchatka, Russia. Journal of Geophysical Research: Solid Earth, 103(B8), pp.18315-18324.
Akademia Nauk Volcano Eruptions
1996 North shore of Karymsky Lake
950 BC? North of Karymsky Lake
3850 BC? North of Karymsky Lake (Lagerny cone)
5500 BC? ± 500 North of caldera lake (Karymsky maar)