Volcano Ivan Grozny. Facts
Name: Ivan Grozny
GVP Number: 290070
Synonims: Grozny, Etorofu-Yakeyama, Yake-yama, Sio Tsirarippu, Sho-Chirippu
Region: Kuril Islands
Volcanic Zone: Southern Kuriles
Coordinates: 45°1'41" N 147°55'4" E
Absolute Elevation: 1211 m
Relative Elevation: 590 m
Status: Active
Aviation Color Code: GREEN
Location: Ivan Grozny volcano is located in the middle of Iturup Island, on its Pacific coast
Type: Lava dome
Composition: two-pyroxene andesites
Last known eruption: 2012/08/16 - 2013/04/04
Large extrusive dome, consisting of three large blocks, separated by depressions. In all likelihood, all the blocks were formed as a result of one, but rather prolonged eruption. At the top of the western, largest block, there are two merged explosive funnels forming a latitudinal moat open to the east. On the northern slope is another, less high dome. On the border of this dome with a slope there is a nest of powerful solfatars. The agglomerate mantle of the domes almost everywhere drops to the foot, forming as a whole in plan a slightly elongated in the meridional direction oval 1.1 x 1.7 km in size. In some places, short, steep tongues of lava flows protrude from below the agglomerate mantle, indicating that the dome grew in the crater of an older central cone. In the northern part, flows reach the caldera wall, and in the south, older streams go down several kilometers. One of them has a length of 6 km and reaches the coast of the ocean, forming a large Cape Dragon with a width of about 1.5 km and a height of 30-50 m [Горшков, 1967].

Горшков Г.С. Вулканизм Курильской островной дуги / Отв. ред. Рудич К.Н. М.: Наука. 1967. 288 с.
Горшков Г.С. Каталог действующих вулканов Курильских островов // Бюллетень вулканологических станций. 1957. № 25. С. 96-178.
Potencial Hazard
Ash clouds, ash falls, pyroclastic flows, hot avalanches and lahars are a potential hazard associated with explosive eruptions of this volcano. The volcano poses a potential hazard to international and local airlines passing in the Kuriles region, since the height of its ash emissions can reach 10-15 km above sea level, ash plumes and clouds can drift hundreds of kilometers from the volcano in different directions. In addition, the outflow of lava flows onto the slopes of the volcano and the surrounding area is possibly.
Related Resources
Active Volcanoes of Kamchatka and Kuriles