Grozny volcanGrozny volcano (Etorofu Yake-yama in Japanese) in central Iturup Island, Kuriles is one of the most frequently active volcanoes of the volcanic island chain.
It is a complex of 2 volcanoes: Ivan Grozny volcano and Tebenkov (also known as Odamoi-san) volcano.
Ivan Grozny volcano has a 3-3.5 km diameter caldera open to the south and includes the andesitic Grozny lava dome, whose name is also used for the whole complex. All known historic eruptions took place from Ivan Grozny volcano.
Introduction:To the NE, there are several other lava domes which are less than 10,000 years old. Their formation modified the shore of a former lake at the northern side of the caldera to extremely sinuous shape.
The forested andesitic Tebenkov volcano is located immediately NE of the Grozny dome complex. Machekh is a crater immediately south of Tebenkov and has strong fumarolic activity.
Source: GVP Grozny volcano information
A magnitude 5.1 earthquake occurred 12 km SE of Grozny volcano on 26 July 2009.
Small phreatic eruptions occurred from the Grozny lava dome between 3 May and August 1989. New fumaroles, fissures and small explosion craters as well as lahars were formed in the eruption. ...plus
A single weak (phreatic) explosion happened at Grozny volcano in January 1973.
sans nom volcanA possible submarine eruption NW of Iturup Island in the southern Kuriles at a depth of 1350 m was reported in 1967. An increase in water temperature and acidity were measured. The cause of this is uncertain, but an unnamed submarine volcano is located close by.
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