Tyatya (, also spelled Tiatia and known as Chachadake (爺爺岳) in Japanese) is an active volcano located in the northeastern part of Kunashir Island, Kuril Islands, Russia. It is the highest peak on the island with an elevation of . Tyatya is one of the finest examples anywhere in the world of a somma volcano, a stratovolcano whose summit has collapsed to form a caldera which has then been mostly refilled by a new, younger volcanic cone which rises above the caldera rim.
See also List of volcanoes in Russia List of ultras of Northeast Asia
References
External links
Chachadake (Tiatia): Global Volcanism Program - Smithsonian Institution Chachadake - Japan Meteorological Agency - Japan Meteorological Agency Chacha Dake (Tyatya) - Geological Survey of Japan