Solar-Terrestrial Physics Solar-Terrestrial Physics Solar-Terrestrial Physics 2500-0535 39590 10.12737/stp-71202110 Results of current research Results of current research Results of current research Variations of ionospheric and geomagnetic field parameters during the June 18, 2013 Bachat earthquake Variations of ionospheric and geomagnetic field parameters during the June 18, 2013 Bachat earthquake https://orcid.org/0000-0003-2254-6138 Белинская Анастасия Юрьевна Belinskaya Anastasiya Yuryevna belinskayaay@ipgg.sbras.ru

кандидат физико-математических наук;

candidate of physical and mathematical sciences;

 Ковалев Александр Анатольевич Kovalev Aleksandr Anatolyevich KovalevAA@ipgg.sbras.ru Семаков Николай Николаевич Semakov Nikolay Nikolaevich SemakovNN@ipgg.sbras.ru Белинская Софья Иосифовна Belinskaya Sofiya Iosifovna Sofiabel@mail.ru Институт нефтегазовой геологии и геофизики им. А.А. Трофимука СО РАН Новосибирск Россия Trofimuk Institute of Petroleum Geology and Geophysics SB RAS Novosibirsk Russian Federation Институт нефтегазовой геологии и геофизики им. А.А.Трофимука СО РАН Новосибирск Россия Trofimuk Institute of Petroleum Geology and Geophysics SB RAS Novosibirsk Russian Federation Институт нефтегазовой геологии и геофизики им. А.А.Трофимука СО РАН Новосибирск Россия Trofimuk Institute of Petroleum Geology and Geophysics SB RAS Novosibirsk Russian Federation Иркутский государственный университет путей сообщения Irkutsk State University of Railway Transport 7 1 78 84 24 09 2020 11 01 2021 https://zh-szf.ru/en/nauka/article/39590/view

The paper presents the results of a study of variations in ionospheric parameters and local magnetic constant before, during, and after the Вachat earthquake, which occurred on June 18, 2013 at 23:02 UT (June 19, 2013 at 06:02 LT) with a magnitude 5.3–5.6 and epicenter coordinates 54.29° N, 86.17° E. We have used data from IPGG SB RAS and TSU ionospheric stations and INTERMAGNET geomagnetic observatories. We have established that in the period preceding the earthquake there was a rather sharp increase in the magnetic moment, and in the subsequent period there was an equally sharp decrease in the magnetic moment. It is noted that the analysis of the daily average values of the local magnetic constant is the most promising for searching for geomagnetic precursors of earthquakes. We have found a low strong sporadic layer Es for two days before the event, the like of which was not observed for 15 days before and 15 days after the event. In addition, on the days preceding the shock, the background values of the F2-layer critical frequency were larger by more than 20 % at the local pre-event hours. On the second day after the earthquake, there appeared a night-time region of low values (about 14 %), which persisted until the morning of the third day.

The paper presents the results of a study of variations in ionospheric parameters and local magnetic constant before, during, and after the Vachat earthquake, which occurred on June 18, 2013 at 23:02 UT (June 19, 2013 at 06:02 LT) with a magnitude 5.3–5.6 and epicenter coordinates 54.29 ° N, 86.17 ° E. We have used data from IPGG SB RAS and TSU ionospheric stations and INTERMAGNET geomagnetic observatories. We have established that in the period preceding the earthquake there was a rather sharp increase in the magnetic moment, and in the subsequent period there was an equally sharp decrease in the magnetic moment. It is noted that the analysis of the daily average values ​​of the local magnetic constant is the most promising for searching for geomagnetic precursors of earthquakes. We have found a low strong sporadic layer Es for two days before the event, the like of which was not observed for 15 days before and 15 days after the event. In addition, on the days preceding the shock, the background values ​​of the F2-layer critical frequency were larger by more than 20% at the local pre-event hours. On the second day after the earthquake, there appeared a night-time region of low values ​​(about 14%), which persisted until the morning of the third day.

 earthquake ionosphere sporadic ionospheric layer local magnetic constant earthquake ionosphere sporadic ionospheric layer local magnetic constant

Adushkin V.V. Tectonic earthquakes of anthropogenic origin. Izvestiya, Physics of the Solid Earth. 2016, vol. 52, pp. 173-194. DOI: 10.1134/S1069351316020014. Adushkin V.V. Tectonic earthquakes of anthropogenic origin. Izvestiya, Physics of the Solid Earth. 2016, vol. 52, pp. 173-194. DOI: 10.1134/S1069351316020014. Akhmedov R.R., Kunitsyn V.E. Simulation of the ionospheric disturbances caused by earthquakes and explosions. Geomagnetism and Aeronomy, 2004, vol. 44, no. 1, pp. 95-101. Akhmedov R.R., Kunitsyn V.E. Simulation of the ionospheric disturbances caused by earthquakes and explosions. Geomagnetism and Aeronomy, 2004, vol. 44, no. 1, pp. 95-101. Batugin A.S. To the analysis of tectonophysical conditions of earthquakes of anthropogenic origin. Issledovaniya po geoinformatike: trudy Geofizicheskogo tsentra RAN [Geoinformatics Research Papers: Proc. the Geophysical Center RAS]. 2017, vol. 5, no. 2, pp. 102-107. DOI: 10.2205/2017BS045. (In Russian). Batugin A.S. To the analysis of tectonophysical conditions of earthquakes of anthropogenic origin. Issledovaniya po geoinformatike: trudy Geofizicheskogo tsentra RAN [Geoinformatics Research Papers: Proc. the Geophysical Center RAS]. 2017, vol. 5, no. 2, pp. 102-107. DOI: 10.2205/2017BS045. (In Russian). Bauer L.A. The local magnetic constant and its variations. Terrestrial Magnetism and Atmospheric Electricity. 1914, vol. 19, no. 3, pp.113-125. Bauer L.A. The local magnetic constant and its variations. Terrestrial Magnetism and Atmospheric Electricity. 1914, vol. 19, no. 3, pp.113-125. Chernogor L.F. Geomagnetic disturbances accompanying the Great Japanese Earthquake of March 11, 2011. Geomagnetism and Aeronomy. 2019, vol. 59, no. 1, pp. 62-75. DOI: 10.1134/S0016793219010043. Chernogor L.F. Geomagnetic disturbances accompanying the Great Japanese Earthquake of March 11, 2011. Geomagnetism and Aeronomy. 2019, vol. 59, no. 1, pp. 62-75. DOI: 10.1134/S0016793219010043. Guglielmi A.V., Zotov O.D. Magnetic perturbations before the strong earthquakes. Izv., Phys. Solid Earth. 2012, vol. 48, pp. 171-173. DOI: 10.1134/S1069351312010065. Guglielmi A.V., Zotov O.D. Magnetic perturbations before the strong earthquakes. Izv., Phys. Solid Earth. 2012, vol. 48, pp. 171-173. DOI: 10.1134/S1069351312010065. Davidenko D.V., Pulinets S.A. Deterministic variability of the ionosphere on the eve of strong (M≥6) earthquakes in the regions of Greece and Italy according to long-term measurements data. Geomagnetism and Aeronomy. 2019, vol. 59, no. 4, pp. 493-508. Davidenko D.V., Pulinets S.A. Deterministic variability of the ionosphere on the eve of strong (M≥6) earthquakes in the regions of Greece and Italy according to long-term measurements data. Geomagnetism and Aeronomy. 2019, vol. 59, no. 4, pp. 493-508. Dobrovolsky I.P., Zubkov S.I., Myachkin V.I. Estimation of the size of the zone of manifestation of earthquake precursors. Modelirovanie predvestnikov zemletryasenii [Modeling of earthquake precursors], Moscow, Nauka Publ., 1980, pp. 7-24. (In Russian). Dobrovolsky I.P., Zubkov S.I., Myachkin V.I. Estimation of the size of the zone of manifestation of earthquake precursors. Modelirovanie predvestnikov zemletryasenii [Modeling of earthquake precursors], Moscow, Nauka Publ., 1980, pp. 7-24. (In Russian). Emanov A.F., Emanov A.A., Fateev A.V., Leskova E.V., Shevkunova E.V., Podkorytova V.G. Technogenic seismicity of Kuzbass sections (Bachat earthquake on June 18, 2013). Fiziko-tekhnicheskie problemy razrabotki poleznykh iskopaemykh [Physical and Technical Problems of Mineral Development]. 2014, no. 2, pp. 41-46. DOI: 10.21455/VIS2016.4-3. (In Russian). Emanov A.F., Emanov A.A., Fateev A.V., Leskova E.V., Shevkunova E.V., Podkorytova V.G. Technogenic seismicity of Kuzbass sections (Bachat earthquake on June 18, 2013). Fiziko-tekhnicheskie problemy razrabotki poleznykh iskopaemykh [Physical and Technical Problems of Mineral Development]. 2014, no. 2, pp. 41-46. DOI: 10.21455/VIS2016.4-3. (In Russian). Emanov A.F., Emanov A.A., Fateev A.V., Leskova E.V. The technogenic Bachat earthquake of June 18, 2013 (ML=6.1) in the Kuznetsk Basin - the world’s strongest in the extraction of solid minerals. Seismic Instruments. 2017, vol. 53, pp. 333-355. DOI: 10.3103/S0747923917040041. Emanov A.F., Emanov A.A., Fateev A.V., Leskova E.V. The technogenic Bachat earthquake of June 18, 2013 (ML=6.1) in the Kuznetsk Basin - the world’s strongest in the extraction of solid minerals. Seismic Instruments. 2017, vol. 53, pp. 333-355. DOI: 10.3103/S0747923917040041. Korsunova L.P., Khegai V.V., Mikhailov Yu.M., Smirnov S.E. Regularities in the manifestation of earthquake precursors in the ionosphere and near-surface atmospheric electric fields in Kamchatka. Geomagnetism and Aeronomy. 2013, vol. 53, no. 2, pp. 227-233. DOI: 10.1134/S0016793213020084. Korsunova L.P., Khegai V.V., Mikhailov Yu.M., Smirnov S.E. Regularities in the manifestation of earthquake precursors in the ionosphere and near-surface atmospheric electric fields in Kamchatka. Geomagnetism and Aeronomy. 2013, vol. 53, no. 2, pp. 227-233. DOI: 10.1134/S0016793213020084. Kocharyan G.G., Kishkina S.B., Budkov A.M., Ivanchenko G.N. On the genesis of the 2013 Bachat earthquake. Geodinamika i tektonofizika [Geodynamics & Tectonophysics]. 2019, vol. 10, no. 3, pp.741-759. DOI: 10.5800/GT-2019-10-3-0439. (In Russian). Kocharyan G.G., Kishkina S.B., Budkov A.M., Ivanchenko G.N. On the genesis of the 2013 Bachat earthquake. Geodinamika i tektonofizika [Geodynamics & Tectonophysics]. 2019, vol. 10, no. 3, pp.741-759. DOI: 10.5800/GT-2019-10-3-0439. (In Russian). Kunitsyn V.E., Krysanov B.Yu., Vorontsov A.M. Acoustic-gravity waves in the Earth’s atmosphere generated by surface sources. Moscow University Physics Bull. 2015, vol. 15, no. 6, pp. 541-548. Kunitsyn V.E., Krysanov B.Yu., Vorontsov A.M. Acoustic-gravity waves in the Earth’s atmosphere generated by surface sources. Moscow University Physics Bull. 2015, vol. 15, no. 6, pp. 541-548. Liperovskiy V.A., Senchenkov S.A., Liperovskaya E.V., Mayster K.-V., Rubtsov L.N., Alimov O.A. Studying disturbances in fbEs dynamics of the night mid-latitude Es layer from minute measurements. Geomagnetizm i aeronomiya [Geomagnetism and Aeronomy]. 1999, vol. 39, no. 1, pp. 131-134. (In Russian). Liperovskiy V.A., Senchenkov S.A., Liperovskaya E.V., Mayster K.-V., Rubtsov L.N., Alimov O.A. Studying disturbances in fbEs dynamics of the night mid-latitude Es layer from minute measurements. Geomagnetizm i aeronomiya [Geomagnetism and Aeronomy]. 1999, vol. 39, no. 1, pp. 131-134. (In Russian). Liperovsky V.A., Pokhotelov O.A., Meyster K.-V., Lipe-rovskaya E.V. Physical models of coupling in the lithosphere-atmosphere-ionosphere system before earthquakes. Geomagnetism and Aeronomy. 2008, vol. 48, no. 6, pp.795-806. DOI: 10.1134/S0016793208060133. Liperovsky V.A., Pokhotelov O.A., Meyster K.-V., Lipe-rovskaya E.V. Physical models of coupling in the lithosphere-atmosphere-ionosphere system before earthquakes. Geomagnetism and Aeronomy. 2008, vol. 48, no. 6, pp.795-806. DOI: 10.1134/S0016793208060133. Lovchikov A.V., Savchenko S.N. On the technogenic nature of the Bachatsky earthquake 06.18.2013. Trudy Chetvertoi tektonofizicheskoi konferentsii IFZ RAN “Tektonofizika i aktual’nye voprosy nauk o Zemle” [Proc. the Fourth Tectonophysical Conference “Tectonophysics and Topical Issues of Earth Sciences”]. Moscow, 2016, pp. 478-480. (In Russian). Lovchikov A.V., Savchenko S.N. On the technogenic nature of the Bachatsky earthquake 06.18.2013. Trudy Chetvertoi tektonofizicheskoi konferentsii IFZ RAN “Tektonofizika i aktual’nye voprosy nauk o Zemle” [Proc. the Fourth Tectonophysical Conference “Tectonophysics and Topical Issues of Earth Sciences”]. Moscow, 2016, pp. 478-480. (In Russian). Pulinets S.A., Uzunov D.P., Karelin A.V., Davidenko D.V. Physical bases of the generation of short-term earthquake precursors: A complex model of ionization-induced geophysical processes in the lithosphere-atmosphere-ionosphere-magnetosphere system. Geomagnetism and Aeronomy. 2015, vol. 55, no. 4, pp. 521-538. DOI: 10.1134/S0016793215040131. Pulinets S.A., Uzunov D.P., Karelin A.V., Davidenko D.V. Physical bases of the generation of short-term earthquake precursors: A complex model of ionization-induced geophysical processes in the lithosphere-atmosphere-ionosphere-magnetosphere system. Geomagnetism and Aeronomy. 2015, vol. 55, no. 4, pp. 521-538. DOI: 10.1134/S0016793215040131. Spivak A.A., Ryabova S.A. Geomagnetic variations during strong earthquakes. Izvestiya, Physics of the Solid Earth. 2019, vol. 55, no 6, pp. 811-820. DOI: 10.1134/S1069351319060077. Spivak A.A., Ryabova S.A. Geomagnetic variations during strong earthquakes. Izvestiya, Physics of the Solid Earth. 2019, vol. 55, no 6, pp. 811-820. DOI: 10.1134/S1069351319060077. URL: https://www.intermagnet.org (accessed June 5, 2020). URL: https://www.intermagnet.org (accessed June 5, 2020). URL: https://www.spaceweatherlive.com/ru/arhiv (accessed June 5, 2020). URL: https://www.spaceweatherlive.com/ru/arhiv (accessed June 5, 2020).