Abstract
The morphology of the Wadati-Benioff zone in the region of Central Kuriles, based on the distribution of 1202 earthquake foci, verified the existence of an intermediate depth aseismic gap and its relation to active andesitic volcanism. Several deep seismically active fracture zones of different tectonic function were delineated in the continental plate and confirmed by the results of deep seismic sounding. A seismically active fracture zone, found in front of the Kamchatka-Kurile trench, indicates the segmented nature of fracturing of the subducting Pacific plate.
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