Open AccessMapping of interplate coupling in the Kamchatka subduction zone from variations in the earthquake size distribution
Author(s) -
I. A. Vorobieva,
A. A. Soloviev,
P. Shebalin
Publication year - 2019
Publication title -
doklady akademii nauk. rossijskaâ akademiâ nauk
Language(s) - English
Resource type - Journals
ISSN - 0869-5652
DOI - 10.31857/s0869-56524844478-481
Subject(s) - subduction , geology , seismology , geodetic datum , slip (aerodynamics) , episodic tremor and slip , coupling (piping) , intraplate earthquake , earthquake rupture , geodesy , tectonics , fault (geology) , physics , engineering , thermodynamics , mechanical engineering
The geometry of supposed coupling zones in the Kamchatka subduction zoneis determined by the earthquake size distribution based on earlier revealed relationship between its shape and rate of inelastic deformations. In the areas of higher aseismic slip, a break of linearity in earthquake size distribution is observed owing to the deficit of large earthquakes. Zones of higher coupling between the oceanic and continental plates are characterized by an excess of large earthquakes and an inverse bend in the earthquake size distribution. The mapping results of the bend value agree with the coupling zones distinguished from satellite geodetic data and inversion of marigrams.