Smaller Brother Volcano

Lesser Brother is a volcano located in the Sakhalin region, on the island of Iturup Big Range of the Kuril Islands. It is located in the north-east of the island, in the west of the Bear Range, two kilometers west of the Kudryavy volcano.

It is an active volcano with an extrusive dome with three craters. Its height reaches 562 meters, diameter – 600 – 700 meters. Lesser Brother has the appearance of a slag cone, which merges with the base of the cone of the Kudryavy volcano. Its width increases to 1,300 meters due to the fact that near the base of the volcano is surrounded by a powerful mantle of breccia. At the top there are two craters, which are separated from each other by a distance of 500 meters. The northwestern crater is heavily destroyed, while the southeastern crater has a closed circuit and a diameter of 70 meters.

The dome is covered with three relatively fresh lava flows. To date, thermal activity has been observed on the volcano.