1) Ushkovsky (3'943 m, Klyuchevskaya (4'750 m) and Kamen (4'579 m), Russia.
2) Popocatépetl (5'462 m), Mexico.
(back to Popocatépetl stamp 2015)
3) Kizimen (2'376 m), Russia.
4) Yasur (361 m), Vanuatu.
5) Nevis Peak (985 m), Nevis.
6) Kilauea (1'277 m), Hawaii. 4)
Illustration:
Osorno (2'652 m), Chile.