Доклады Академии наукДоклады Академии наук0869-5652The Russian Academy of Sciences1256510.31857/S0869-56524844478-481Research ArticleMapping of interplate coupling in the Kamchatka subduction zone from variations in the earthquake size distributionVorobievaI. A.vorobiev@mitp.ruSolovievA. A.<p>Corresponding Member of the RAS</p>vorobiev@mitp.ruShebalinP. N.vorobiev@mitp.ru0505201948444784810405201904052019Copyright © 2019, Russian academy of sciences2019<p>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.</p>Kamchatkainterplate couplingearthquake size distributionКамчаткамежплитовое сцеплениемагнитудно-частотное распределение[Lay T., Kanamori H., Ruff L.T. // Earthquake Predict. Res. 1982. V. 1. P. 3–71.][Pacheco J.F., Sykes L.R., Scholz C.H. // J. Geophys. Res. 1993. V. 98. P. 14,133–14,159.][Scholz C.H., Campos J. // J. Geophys. Res. 2012. V. 117. P. B05310. DOI: 10.1029/2011JB009003.][Johnson J.M., Satake K. // Pure Appl. Geophys. 1999. V. 154. P. 541–553.][MacInnes B.T., Weiss R., Bourgeois J., Pinegina T.K. // Bull. Seismol. Soc. Amer. 2010. V. 100. P. 1695–1709. DOI: 10.1785/0120090376.][Zobin V.M., Levina V.I. // Bull. Seismol. Soc. Amer. 2001. V. 91. P. 1619–1628.][Bürgmann R., Kogan M.G., Levin V.E., Scholz C.H., King R.W., Steblov G.M. // Geophys. Res. Lett. 2001. V. 28. P. 1331–1334. DOI: 10.1029/2000GL012350.][Bürgmann R., Kogan M.G., Steblov G.M., Hilley G., Levin V.E., Apel E. // J. Geophys. Res. 2005. V. 110. P. B07405. DOI: 10.1029/2005JB003648.][Vorobieva I., Shebalin P., Narteau C. // Geophys. Res. Lett. 2016. V. 43. P. 6869–6875.][Левина В.И., Ландер А.В., Митюшкина С.В., Чеброва А.Ю. // Вулканология и сейсмология. 2013. № 1. C. 41–64.][Zaliapin I., Ben-Zion Y. // Geophys. J. Int. 2016. V. 207. P. 608–634.][Vorobieva I., Narteau C., Shebalin P., Beauducel F., Nercessian A., Clouard V., Bouin, M.‐P. // Bull. Seismol. Soc. Amer. 2013. V. 103. P. 2188–2202.][Bender B. // Bull. Seismol. Soc. Amer. 1997. V. 73. P. 831–851.][Федотов С.А., Чернышев С.Д., Матвиенко Ю.Д., Жаринов Н.А. // Вулканология и сейсмология. 1998. № 6. С. 3.][Bourgeois J., Pinegina T.K. // Nat. Hazards Earth Syst. Sci. 2018. V. 18. P. 335–350.]