Kamchatka, Russia
Volcanic activity in Kamchatka is a result of convergence of Eurasian and Pacific plates, the latter of which presently subducts at a rate of 8-9 cm/year.
Sredinny Ridge (Sredinny Range) is located in the back arc region, 400 km from the present trench. The range is one of the least studied regions in Kamchatka.
There is an active Benioff zone in the southern part of the Range, at a depth of 350 km. In the north, subduction appears to have stopped, although active volcanoes are still located in the area.
Active volcanoes are locared in the range.