
1) Caldera of Russia 2) Mountain of the Kuril Islands 3) Stratovolcano of Russia 4) Uninhabited island of Russia
Found on
https://www.crosswordclues.com/clue/onekotan

Onekotan Island (Онекотан; Japanese 温禰古丹島; Onekotan-tō, occasionally Onnekotan-tō, オネコタン or オネコタㇴ) is an uninhabited volcanic island located near the northern end of the Kuril Islands chain in the Sea of Okhotsk in the northwest Pacific Ocean. Its name is derived from the Ainu language for `large villag....
Found on
http://en.wikipedia.org/wiki/Onekotan
No exact match found.