Volcano Chyornogo. Facts
Name: Chyornogo
GVP Number: 290150
Synonims: Io San, North Brother
Region: Kuril Islands
Volcanic Zone: Southern Kuriles
Coordinates: 46°31'15" N 150°52'3" E
Absolute Elevation: 624 m
Status: Active
Aviation Color Code: GREEN
Location: The volcano is located in the center of Chirpoy Island
Type: Stratovolcano
Composition: two-pyroxene andesites
Last known eruption: 1857/07
The Cherny cone forms an even strongly truncated cone with a well-defined crater with a diameter of 330 m at the summit. The inner walls of the crater look like a steep funnel with a slope angle of about 60 °; at a depth of 150 m there is a flat bottom with a diameter of 150 m. The slopes of the cone are flat, without erosion potholes.
The surface of the cone is covered with light pyroclastic, in some places lava flows are visible, heavily covered with ash at the source. A large wide lava flow descends from the crater along the western slope and reaches the shore of the Sea of ​​Okhotsk, a number of flows flowed down the eastern slope. The longest flow, up to 3 km, descends along the northern slope. At the foot of the Cherny cone from the east, there are two side craters, from which lava flows into the ocean flowed. Currently, the Cherny cone is actively solfatory. Solfatar exits are located at the bottom and along the walls of the summit crater. A powerful, linearly elongated group of solfatars is located on the western slope at the top.

The volcano is named after the Cossack centurion Ivan Cherny, who in 1766-1769 made a detailed description of the 19 Kuril Islands he visited.

Горшков Г.С. Вулканизм Курильской островной дуги / Отв. ред. Рудич К.Н. М.: Наука. 1967. 288 с.
Potencial Hazard
Ash clouds, ash falls, pyroclastic flows, hot avalanches and lahars are a potential hazard associated with explosive eruptions of this volcano. The volcano poses a potential hazard to international and local airlines passing in the Kuriles region, since the height of its ash emissions can reach 10-15 km above sea level, ash plumes and clouds can drift hundreds of kilometers from the volcano in different directions. In addition, the outflow of lava flows onto the slopes of the volcano and the surrounding area is possibly.
Related Resources
Active Volcanoes of Kamchatka and Kuriles