| Abstract PDF ENG | Резюме PDF RUS | Full text PDF RUS |
Abstract. The authors revealed an effect of gravitational field variations for the principal lunar wave O1, which preceded nearby earthquakes, using for the first time the approach based on the method of calculating tidal parameters in a sliding window with various window width (from 30 to 120 days). Since the observed data were free from the oceanic load, this effect is assumed to be associated with a local restructuring of the density medium in the solid Earth. A seasonal cyclycity was revealed for the K1 wave. Such cyclycity was not taken into account when compiling a solid Earth model PREM (preliminary reference Earth model).
Keywords:
tidal variations of gravity, geodynamics, seismicity, gravity effect
For citation: Valitov M.G., Proshkina Z.N. Change in the amplitude indicators in tidal variations of gravity during the preparation of nearby earthquakes. Geosistemy perehodnykh zon = Geosystems of Transition Zones, vol. 5, no. 3, pp. 223–228. (In Russ., abstr. in Engl.).
https://doi.org/10.30730/gtrz.2021.5.3.223-228
Для цитирования: Валитов М.Г., Прошкина З.Н. Изменение амплитудных показателей в приливных вариациях силы тяжести в период подготовки близких землетрясений. Геосистемы переходных зон, 2021, т. 5, № 3, с. 223–228.
https://doi.org/10.30730/gtrz.2021.5.3.223-228
References
1. Dobrovolsky I.P. Gravitational precursors of a tectonic earthquake. 2005 . Izvestiya. Physics of the Solid Earth , 41 (4): 273–278.
2. Dovbnya B.V., Pashinin A.Yu., Rakhmatulin R.A. 2019 . Short-term electromagnetic precursors of earthquakes. Geodynamics &Tectonophysics , 10(3): 731–740. (In Russ). https://doi.org/10.5800/GT-2019-10-3-0438
3. Dolgikh G.I., Kuptsov A.V., Larionov I.A., Marapulets Y.V., Shvets V.A., Shevtsov B.M., Shirokov O.P., Chupin V.A., Yakovenko S.V. 2007 . Deformation and acoustic precursors of earthquakes. Doklady Earth Sciences , 413(1): 281–285. https://doi.org/10.1134/S1028334X07020341
4. Mel’khior P. 1968 . Zemnye prilivy [Earth tides ]. M.: Mir, 482 p. (In Russ.).
5. Proshkina Z.N., Valitov M.G., Kolpashchikova T.N., Naumov S.B. 2021 . Estimation of Hydrodynamic effect on tidal variations in gravityin the transition zone from the continent to the Sea of Japan. Izv., Physics of the Solid Earth , 57(1): 98–109. URL:https://link.springer.com/article/10.1134%2FS1069351321010067 (accessed 15.06.2021).
6. Proshkina Z.N., Valitov M.G., Kulinich R.G., Kolpashchikova T.N. 2015 . Investigation of tidal gravity in the transition zone from continent to the Sea of Japan. Vestnik KRAUNTs. Nauki o Zemle = Bull. of KRAESC. Earth Sciences , 3(27): 71–79. (In Russ.).
7. Sdelnikova I.A., Steblov G.M. 2016 . Monitoring of the tsunamigenic earthquakes by means of satellite geodesy. Geophysical Research , 17(1): 46–55. (In Russ.).
8. Semenov R.M. 2010 . Earthquake of 27 August 2008 in the Southern Baikal area and its precursors. Geodynamics & Tectonophysics , 1(4): 441–447 (In Russ).
9. Sobolev G.A. 1993 . [The basis for earthquake prediction ]. Moscow: Nauka, 314 p. (In Russ).
10. Utkin V.I., Yurkov A.K. 2010 . Radon as a tracer of tectonic movements. Russian Geology and Geophysics , 51(2): 220–227. https://doi.org/10.1016/j.rgg.2009.12.022
11. Fedotov S.A., Magus’kin M.A., Levin V.E. et al. 1988 . [Earth surface deformations at the eastern coast of Kamchatka and their relation to the seismicity]. Volcanology & Seismology , 1: 24–40. (In Russ).
12. Dziewonski, A.M., Anderson, D.L. 1981 . Preliminary reference Earth model. Physics of the Earth and Planetary Interiors , 25: 297–356. https://doi.org/10.1016/0031-9201(81)90046-7
13. Wenzel H.G. 1996 . The nanogal software: Earth tide data processing package ETERNA 3.30. Bull. Inf. Marees Terrestres , 124: 9425–9439.