Avacha volcano is one of the most active in Kamchatka (2751m). it is often called a “home volcano” because of its closeness to the city. Its crater is filled with hardened lava above which hot steams of fumaroles can be seen rather often.
The top of Plosky Tolbachik is “cut” by the caldera of 3 km in diameter. The caldera is fi lled with ice and eruption products. There is a depression in the western part of the caldera which is about 300 m in diameter and 40-50 m in depth.