Estimation of the Earth's crustal thickness of central Kamchatka according to temporary and permanent seismic stations
https://doi.org/10.18303/2619-1563-2025-2-60
Abstract
The work is devoted to the study of the heterogeneity of the boundary of the Earth's crust and mantle in the central region of the Kamchatka Peninsula. For the research area, according to a dense network of 33 temporary and 14 permanent stations for 2019–2020, the values of the thickness of the Earth's crust and the average VP/VS ratio were calculated. To determine the depth of the crust-mantle boundary (Moho), the receiver function method was used, based on the analysis of the difference in the arrival time of direct and exchange phases of seismic waves from teleseismic events. The inversion of the receiver functions was carried out using the grid search method in the coordinates H (crust thickness) and k (VP/VS ratio), assuming that the crust is a homogeneous isotropic layer on a half-space. The results showed that the Moho depth ranges from 30–35 km under the stations in the Kamchatka central region, with a deepening to 40 km in the area of the Avacha Volcano. For the stations of the temporary network that were set up by the IPGG SB RAS staff, and most of the stations of the KB GS RAS permanent network, the result was obtained for the first time and in the intersection areas is consistent with the conclusions contained in previously published works by other authors.
Keywords
Supporting agencies: The study was carried out as part of government assignment to the Russian Academy of Sciences in basic research, Project FWZZ-2022-0017.
About the Authors
T. A. Stupina
Trofimuk Institute of Petroleum Geology and Geophysics, SB RAS
Russian Federation
Russian Federation
Tatiana A. Stupina
Koptyug Ave., 3, Novosibirsk, 630090
N. A. Bushenkova
Trofimuk Institute of Petroleum Geology and Geophysics, SB RAS
Russian Federation
Russian Federation
Natalia A. Bushenkova
Koptyug Ave., 3, Novosibirsk, 630090
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Review
For citations:
Stupina T.A., Bushenkova N.A. Estimation of the Earth's crustal thickness of central Kamchatka according to temporary and permanent seismic stations. Russian Journal of Geophysical Technologies. 2025;(2):60-73. (In Russ.) https://doi.org/10.18303/2619-1563-2025-2-60
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