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Country: | Russia | |
| Subregion Name: | Kuril Islands | ||
| Volcano Number: | 0900-07= | ||
| Volcano Type: | Complex volcanoes | ||
| Volcano Status: | Historical | ||
| Last Known Eruption: | 1989 | ||
| Summit Elevation: | 1211 m | 3,973 feet | |
| Latitude: | 45.026°N | 45°1'34"N | |
| Longitude: | 147.922°E | 147°55'19"E | |
| The Grozny volcano group in central Iturup Island contains the complex volcanoes of Ivan Grozny and Tebenkov. The former has a 3-3.5 km diameter caldera that is open to the south, where the large, 1158-m-high andesitic Grozny extrusion dome (also known as Etorofu-Yake-yama) was emplaced. Several other lava domes of Holocene age were constructed to the NE; extrusion of these domes has constricted a former lake in the northern side of the caldera to an extremely sinuous shoreline. The forested andesitic Tebenkov volcano, also known as Odamoi-san, lies immediately to the NE of the Grozny dome complex. The large Machekh crater, which displays strong fumarolic activity, lies immediately south of Tebenkov. Historical eruptions, the first of which took place in 1968, have been restricted to Ivan Grozny. | |||
