The three volcanoes just north of Petropavlovsk, from left to right, Koryaksky, Avachinsky and Kozhelsky.
[Maurice de Graaf]
Avachinsky just after it's 2001 eruption. You can see the grey ash on the white snow. The plume is just a normal
fumarol plume, as can be daily observed on Avachinsky. The somma structure can be clearly seen. Koryaksky is in the background.
[photo by unknown, via IVVG]