TY - JOUR

T1 - Peculiarities of Localization Zones of the Major Earthquakes in the Kuril-Kamchatka Arc

AU - Besedina, A. N.

AU - Novikova, E. V.

AU - Beloklokov, P. V.

AU - Komzeleva, V. P.

AU - Kulik, E. A.

AU - Marshakova, E. A.

AU - Nugmanov, I. I.

AU - Potapova, K. Yu

N1 - Conceptualization of the study and the formulation of scientific problems were carried out by A.N. Besedina within the framework of Russian Science Foundation project no. 22-17-00204. Scientific problems were solved within the framework of the scientific school project “Geophysics of Natural Disasters” with the financial support of the MIPT Endowment Fund. The discussion and presentation of the results were carried out within the framework of the geophysical school at a satellite event of the Congress of Young Scientists in Petropavlovsk-Kamchatskii.

PY - 2025/7/23

Y1 - 2025/7/23

N2 - Abstract—The processes occurring during the interaction of crustal blocks in a subduction zone are reflected both in the features of the seismic regime and in the distribution of the major earthquake sources in the study area. In this study, we analyze the peculiarities of localization zones of the major earthquakes of the Kuril-Kamchatka arc based on two catalogs: the regional catalog of Kamchatka Branch, Federal Research Center, Geophysical Survey, Russian Academy of Sciences, and global international catalog of USGS NIEC of the US Geological Service for 1990–2024. Combination of catalogs based on a modified nearest neighbor method allowed us to remove duplicates—repeated earthquakes in initial catalogs—and to obtain a new unified catalog consisting of 52 574 earthquakes. The nearest neighbor method was applied to identify two subsets: independent and spatially and temporally clustered earthquakes, which were further used to analyze the density of seismic events. The obtained regularities were compared with the focal characteristics of the major earthquakes of the subduction zone. The proposed approach allowed us to identify localization zones of potential megaearthquake sources along the Kuril-Kamchatka arc.

AB - Abstract—The processes occurring during the interaction of crustal blocks in a subduction zone are reflected both in the features of the seismic regime and in the distribution of the major earthquake sources in the study area. In this study, we analyze the peculiarities of localization zones of the major earthquakes of the Kuril-Kamchatka arc based on two catalogs: the regional catalog of Kamchatka Branch, Federal Research Center, Geophysical Survey, Russian Academy of Sciences, and global international catalog of USGS NIEC of the US Geological Service for 1990–2024. Combination of catalogs based on a modified nearest neighbor method allowed us to remove duplicates—repeated earthquakes in initial catalogs—and to obtain a new unified catalog consisting of 52 574 earthquakes. The nearest neighbor method was applied to identify two subsets: independent and spatially and temporally clustered earthquakes, which were further used to analyze the density of seismic events. The obtained regularities were compared with the focal characteristics of the major earthquakes of the subduction zone. The proposed approach allowed us to identify localization zones of potential megaearthquake sources along the Kuril-Kamchatka arc.

KW - Kuril-Kamchatka arc

KW - asperity

KW - contact patches

KW - duplicates

KW - earthquakes

KW - nearest neighbor method

KW - rupture zone

KW - subduction zone

UR - https://www.mendeley.com/catalogue/ce9088c5-0caa-3e19-8608-1941a59602e6/

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105011363284&origin=inward

U2 - 10.1134/S1069351325700132

DO - 10.1134/S1069351325700132

M3 - Article

VL - 61

SP - 175

EP - 188

JO - Izvestiya, Physics of the Solid Earth

JF - Izvestiya, Physics of the Solid Earth

SN - 1069-3513

IS - 2

ER -