BackgroundKizimen's shape is similar to Mount St. Helens before the massive 1980 eruption. The northwestern side of Kizimen volcano is cut by NE-SW-trending normal faults, which form a series of cliffs, and could be the site of a future flank collapse.
The summit of Kizimen is formed by overlapping lava domes, from which blocky lava flows descend the flanks of the volcano.
Kizimen is at the W end of a volcanic chain north of Kronotsky volcano. Kizimen itself was built during four eruptive cycles beginning about 12,000 years ago and lasting 2000-3500 years each, separated by large explosive eruptions about 12000, 8300 and 3000 years ago. In between those major explosive eruptions, lava domes were formed in at least 3 phases.
Another large explosive eruption occurred about 1100 years ago. It produced a lateral blast and created a 1.0 x 0.7 km wide crater breached to the NE, inside which a small lava dome has grown. Before the eruption starting in 2010, the only known historic activity took place in 1927-28.
See also: Sentinel hub | Landsat 8 | NASA FIRMS