Mount Rannyaya (86°58' S, 163°20' W, 2270 m a.s.l., 18-20 Ма) и Sheridan Bluff (87°04' S, 153°46' W, 2720 m a.s.l., ~ 16 Ма) were explored in 1934 and 1962-1963, and studied and dated in 1978-1979 bу Antarctic researches. The article shows that these volcanoes are typical tuya, the oldest and high-latitude volcanoes on Earth. It confirms that in early Miocene thick glaciers existed in western Antarctic near the Pole, and subglacial volcanic activity was strong.

Three stages of study of active and potentially active volcanoes on Kamchatka and the Kurile Islands were distinguished: the anterior stage (1700-1935), the new stage (1935-1962) and the recent stage (from 1962 till present time).
This paper provides a new, for the first time scientifically based term of «active volcano». Updated catalogues display active and potentially active volcanoes of Kamchatka and the Kurile Islands. Here we propose a long-term forecast of behavior and parameters of impending eruptions and related volcanic hazards for the typical volcanoes of the 1st and the 2nd stages of evolution.