BackgroundThe northnmost cone has only produced tephra. The second cone, Mount Boryask, erupted a 3.5-km-long lava flow that traveled to the east. The third cone erupted a lava flow that traveled 5.5 km to the east and NE. The Lomonosov lava dome, the highest point of the complex, is near the southern end of the group. It had produced a 7-km-long lava flow extending westward and almost reached the Sea of Okhotsk. The southernmost cone was the source of a lava flow that traveled 4 km initially SE and then east.
Source: GVP volcano information
See also: Sentinel hub | Landsat 8