BackgroundBerg and Trezubetz volcanoes, flanking Kolokol on the NW, have breached summit calderas partially filled by lava domes. Trezubetz, whose name means "trident," has an eroded crater rim with 3 large peaks when seen at sea from the north.
Several lava flows originate from Kolokol; one of these extends almost to the Sea of Okhotsk coast. A viscous lava flow armoring the SE flank is probably the most recent from Kolokol.
Borzov volcano, the oldest of the group, lies to the SW of Kolokol.
from: GVP volcano information
See also: Sentinel hub | Landsat 8 | NASA FIRMS