SOME FEATURES OF SEISMIC REGIME IN THE KAMCHATKA REGION: SEISMIC ACTIVATION IN 2000–2021
https://doi.org/10.5800/GT-2025-16-4-0836
EDN: WKHSNK
Abstract
This paper mainly considers seismicity in the Kamchatka region. Based on 60-year-long instrumental observations, there were seven seismic layers identified according to depth distribution of seismic energy. For each layer, there were obtained seismicity characteristics: a number of events in a layer, depth of peak energy penetration, total energy in a layer, slope of a trend line in recurrence plots, ratio of the total energy of earthquakes with a K-value greater than 14 to that of earthquakes with a K-value between 10 and 14. The slope of the trend line in recurrence plots decreases with depth from 0.63 to 0.36. Almost half of the total seismic energy fell within the depth greater than 50 km.
The change in seismic layers during the instrumental observations is shown on plots of deviations from uniform increase in the accumulation of cumulative energy over time and cumulative total amount of events. The movement on the plots allows making an assumption about the constancy of subduction velocity and stability of background seismic energy dissipation for the Kamchatka region on the intervals with a linear increase in the accumulation of cumulative energy over time.
An increase in the accumulation rate of the cumulative total amount of earthquakes at depths greater than 550 km was subsequently followed by an increase in the accumulation rate of the cumulative total amount of events in 0–35 and 80–130 km layers. It is shown that since the 2000s there has been an increase in seismic activity in seismic focal zone of the Kamchatka region.
Supporting agencies: The study was supported by the Ministry of Science and Higher Education of the Russian Federation on the state assignment No. 075-00604-25 using the data obtained with LSRF "Seismic infrasound array for monitoring Arctic cryolitozone and continuous seismic monitoring of the Russian Federation, neighbouring territories and the world".
About the Author
Yu. V. Shevchenko
Kamchatka Branch of the Federal Research Center of the Geophysical Survey, Russian Academy of Sciences
Russian Federation
Russian Federation
9 Piip Blvd, Petropavlovsk-Kamchatsky 683006
References
1. Abe K., Kanamori H., 1980. Magnitudes of Great Shallow Earthquakes from 1953 to 1977. Tectonophysics 62 (3–4), 191–203. https://doi.org/10.1016/0040-1951(80)90192-4.
2. Abubakirov I.R., Pavlov V.M., Titkov N.N., 2015. The Mechanism of the Deep-Focus, Sea of Okhotsk Earthquake of May 24, 2013 as Inferred from Static Displacements and Broadband Seismograms. Journal of Volcanology and Seismology 9, 242–257. https://doi.org/10.1134/S0742046315040028.
3. Agaian A.S., Nekrasova A.K., 2024. Analysis of Spatial Clustering of Seismic Events in the Northwest Pacific Ocean. Izvestiya, Physics of the Solid Earth 60, 795–805. https://doi.org/10.1134/S1069351324700733.
4. Allmann B.P., Shearer P.M., 2009. Global Variations of Stress Drop for Moderate to Large Earthquakes. Journal of Geophysical Research: Solid Earth 114 (В1), B01310. https://doi.org/10.1029/2008JB005821.
5. Ambraseys N.N., 1990. Uniform Magnitude Re-Evaluation of European Earthquakes Associated with Strong-Motion Records. Earthquake Engineering and Structural Dynamics 19 (1), 1–20. https://doi.org/10.1002/eqe.4290190103.
6. Boatwright J., Choy G., 1986. Teleseismic Estimates of the Energy Radiated by Shallow Earthquakes. Journal of Geophysical Research: Solid Earth 91 (B2), 2095–2112. https://doi.org/10.1029/JB091iB02p02095.
7. Bondár I., Storchak D.A., 2011. Improved Location Procedures at the International Seismological Centre. Geophysical Journal International 186 (3), 1220–1244. https://doi.org/10.1111/j.1365-246x.2011.05107.x.
8. Bormann P., Wylegalla K., 1975. Investigation of the Correlation Relationships Between Various Kinds of Magnitude Determination at Station Moxa Depending on the Type of Instrument and on the Source Area (in German). Publications of the Institute of Geophysics, Polish Academy of Sciences 93, 160–175.
9. Brudzinski M.R., Thurber C.H., Hacker B.R., Engdahl E.R., 2007. Global Prevalence of Double Benioff Zones. Science 316 (5830), 1472–1474. https://doi.org/10.1126/science.1139204.
10. Chebrov V.N., Droznin D.V., Kugaenko Yu.A., Levina V.I., Senyukov S.L., Sergeev V.A., Shevchenko Yu.V., Yashchuk V.V., 2013a. The System of Detailed Seismological Observations in Kamchatka in 2011. Journal of Volcanology and Seismology 7, 16–36. https://doi.org/10.1134/s0742046313010028.
11. Chebrov V.N., Saltykov V.A., Serafimova Yu.K., 2013b. Identifying the Precursors of Large (M≥6.0) Earthquakes in Kamchatka Based on Data from the Kamchatka Branch of the Russian Expert Council on Earthquake Prediction: 1998–2011. Journal of Volcanology and Seismology 7, 76–85. https://doi.org/10.1134/S074204631301003X.
12. Chebrova A.Yu., Chemarev E.A., Matveenko E.A., Chebrov D.V., 2020. Seismological Data Information System in Kamchatka Branch of GS RAS: Organization Principles, Main Elements and Key Functions. Geophysical Research 21 (3), 66–91 (in Russian) https://doi.org/10.21455/gr2020.3-5.
13. Dobretsov N.L., Kirdyashkin A.G., Kirdyashkin A.A., 2001. Deep Geodynamics. GEO, Novosibirsk, 409 p. (in Russian)
14. Fedotov S.A., 1972. Energy Classification of the Kuril-Kamchatka Earthquakes and the Problem of Magnitudes. Nauka, Moscow, 116 p. (in Russian)
15. Fedotov S.A., 1975. Strong Kamchatka Earthquakes of 1971. Far East Scientific Center of the USSR Academy of Sciences, Vladivostok, 153 p. (in Russian)
16. Fedotov S.A., Kuzin I.P., Bobkov M.F., 1964. Detailed Seismological Studies in Kamchatka in 1961–1962. Bulletin of the USSR Academy of Sciences. Geophysical Series 9, 1360–1375 (in Russian)
17. Gontovaya L.I., Popruzhenko S.V., Nizkous I.V., 2010. Upper Mantle Structure in the Ocean–Continent Transition Zone: Kamchatka. Journal of Volcanology and Seismology 4, 232–247. https://doi.org/10.1134/S0742046310040020.
18. Gordeev E.I., Fedotov S.A., Chebrov V.N., 2013. Detailed Seismological Investigations in Kamchatka During the 1961–2011 Period: Main Results. Journal of Volcanology and Seismology 1, 3–18. https://doi.org/10.1134/s0742046313010041.
19. Gordeev E.I., Gusev A.A., Levina V.I., Leonov V.L., Chebrov V.N., 2006. Shallow Earthquakes of the Kamchatka Peninsula. Journal of Volcanology and Seismology 3, 28–38 (in Russian)
20. Gusev A.A., Melnikova V.N., 1990. The Relationships Between Magnitudes – Global Averages and for Kamchatka. Journal of Volcanology and Seismology 6, 55−63 (in Russian)
21. Gusev A.A., Shumilina L.S., 2004. Recurrence of Kamchatka Strong Earthquakes on a Scale of Moment Magnitudes. Izvestiya, Physics of the Solid Earth 40 (3), 206–215.
22. Hacker G.R., Peacock S.M., Aubers G.A., Holloway S.D., 2003. Subduction Factory 2. Are Intermediate-Depth Earthquakes in Subducting Slabs Linked to Metamorphic Dehydration Reactions? Journal of Geophysical Research: Solid Earth 108 (B1), 2030. https://doi.org/10.1029/2001jb001129.
23. Hess H.H., 1962. History of the Ocean Basins. In: Petrologic Studies: A Volume in Honor of A.F. Buddington. Geological Society of America, New York, p. 599–620. https://doi.org/10.1130/petrologic.1962.599.
24. Kanamori H., Anderson D.L., 1975. Theoretical Basis of Some Empirical Relations in Seismology. Bulletin of the Seismological Society of America 65 (4), 1073–1095. DOI:10.1785/BSSA0650051073.
25. Kennett B.L.N., Engdahl E.R., Buland R., 1995. Constraints on Seismic Velocities in the Earth from Traveltimes. Geophysical Journal International 122 (1), 108–124. https://doi.org/10.1111/j.1365-246x.1995.tb03540.x.
26. Levina V.I., Lander A.V., Mityushkina S.V., Chebrova A.Yu., 2013. The Seismicity of the Kamchatka Region: 1962–2011. Journal of Volcanology and Seismology 7, 37–57. https://doi.org/10.1134/S0742046313010053.
27. Lobkovsky L.I., 1988. Geodynamics of Spreading Zones, Subduction Zones and Two-Levelplate Tectonics. Nauka, Moscow, 251 p. (in Russian)
28. Lobkovsky L.I., Nikishin A.M., Khain V.E., 2004. Current Problems of Geotectonics and Geodynamics. Nauchny Mir, Moscow, 612 p. (in Russian)
29. Reznichenko R.A., Goev A.G., Aleshin I.M., Tarasov S.A., Gontovaya L.I., Chebrov D.V., 2023. Deep Velocity Sections of the Avachinskaya Bay Area of the Kamchatka Peninsula Obtained by the Receiver Function Method. Geophysical Research 24 (2), 25−38 (in Russian) [https://doi.org/10.21455/gr2023.2-2.
30. Sadovsky M.A., Bolkhovitinov L.G., Pisarenko V.F., 1987. Deformation of Geophysical Environment and Seismic Process. Nauka, Moscow, 100 p. (in Russian)
31. Saltykov V.A., Kugaenko Y.A., Kravchenko N.M., Konovalova A.A., 2013. A Parametric Representation of Kamchatka Seismicity over Time. Journal of Volcanology and Seismology 7, 58–75. https://doi.org/10.1134/S0742046313010065.
32. Seliverstov N.I., 2009. Geodynamics of the Junction Zone of the Kuril-Kamchatka and Aleutian Island Arcs. KamSU, Petropavlovsk-Kamchatsky, 191 p. (in Russian)
33. Sergeev K.F., 1976. Tectonics of the Kuril Island System. Nauka, Moscow, 239 p. (in Russian)
34. Sobolev G.A., 2010. The Present-Day Seismicity Variations in the Kuril-Kamchatka Seismic Zone. Journal of Volcanology and Seismology 4, 367–377. https://doi.org/10.1134/S0742046310060011.
35. Sorokhtin O.G., Ushakov S.A., 1993. The Nature of Tectonic Activity of the Earth. VINITI, Moscow, 291 p. (in Russian)
36. Venkataraman A., Kanamori H., 2004. Observational Constraints on the Fracture Energy of Subduction Zone Earthquakes. Journal of Geophysical Research: Solid Earth 109 (В5), B05302. https://doi.org/10.1029/2003JB002549.
37. Ye L., Lay T., Kanamori H., Koper K.D., 2013. Energy Release of the 2013 Mw=8.3 Sea of Okhotsk Earthquake and Deep Slab Heterogeneity. Science 341 (6152), 1380–1384. https://doi.org/10.1126/science.1242032.
38. Zharkov V.N., 2012. Physics of the Earth’s Interior. Science and Education, Moscow, 384 p. (in Russian)
Review
For citations:
Shevchenko Yu.V. SOME FEATURES OF SEISMIC REGIME IN THE KAMCHATKA REGION: SEISMIC ACTIVATION IN 2000–2021. Geodynamics & Tectonophysics. 2025;16(4):0836. (In Russ.) https://doi.org/10.5800/GT-2025-16-4-0836. EDN: WKHSNK
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