Geophysical research: article

ON GLOBAL GEOMAGNETIC DISTURBANCES, PRESUMABLY CAUSED BY EARTHQUAKES
O.V. Kozyreva V.A. Martines-Bedenko V.A. Pilipenko
Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Geophysical research
Tome: 25
Number: 3
Year: 2024
Pages: 62-74
UDK: 550.385
DOI: 10.21455/gr2024.3-4
Full text
Keywords: electromagnetic precursors of earthquakes, anomalous geomagnetic disturbances, geomagnetic pulsations, co-seismic effect.
Аnnotation: The question of the possibility of global geomagnetic disturbances during earthquakes, the registration of which was reported in numerous publications in leading Russian geophysical journals, is considered. If the mentioned results are confirmed, it could be a major discovery in geophysics, so they require detailed verification. Comparison of disturbances given in publications with data from high-latitude magnetic stations showed that the entire set of morphological properties of long-period disturbances (with quasi-periods of 10–40 min) indicates that these are characteristic manifestations of activation of the magnetospheric-ionospheric current system at auroral latitudes. Thus, the detected disturbances represent a mid-latitude response to electrojet variations in the auroral region and are not associated with seismic activity. Short-period disturbances (with a characteristic period of less than 1 min) turned out to be either a co-seismic geomagnetic response to a surface seismic wave, or a burst of Pc3 pulsations of magnetospheric origin that accidently coincided with the moment of a distant earthquake. The presented study serves as a clear illustration of the fact that the identification of anomalous disturbances should be carried out jointly by specialists in earthquake physics and space weather.
Bibliography: Adushkin V.V., Kuz’micheva M.Yu., Spivak A.A., Disturbance of the geomagnetic field during earthquakes, Doklady Earth Sciences, 2022, vol. 506, no. 2, pp. 813-817.

Adushkin V.V., Spivak A.A., Fizicheskie polya v pripoverkhnostnoi geofizike (Physical fields in the near-surface geophysics), Moscow, GEOS, 2014, 360 p. [In Russian].

Adushkin V.V., Spivak A.A., Impact of natural extreme events on geophysical fields in the environment, Izvesti-ya, Physics of the Solid Earth, 2021, vol. 57, no. 5, pp. 583-592.

Gjerloev J.W., The SuperMAG data processing technique, Journal of Geophysical Research: Space Physics, 2012, vol. 117, 19 p. DOI: 10.1029/2012JA017683

Guglielmi A.V., Excitation of electromagnetic field oscillations by elastic waves in a conducting body, Geomag-netizm i aeronomiya (Geomagnetism and Aeronomy), 1986, vol. 26, no. 3, pp. 467-470. [In Russian].

Iyemori T., Nose M., Han D-S., Gao Y-F., Hashizume M., Choosakul N., Shinagawa H., Tanaka Y., Utsugi M., Saito A., McCreadie H., Odagi Y., Yang F-X., Geomagnetic pulsations caused by the Sumatra earthquake on December 26, 2004, Journal of Geophysical Research Letters, 2005, vol. 32, 4 p.

Kosterin N.A., Pilipenko V.A., Dmitriev E.M., On global ultralow frequency electromagnetic signals prior to earthquakes, Geofizicheskie issledovaniya (Geophysical Research), 2015, vol. 16, no. 1, pp. 24-34. [In Russian].

Kozyreva O.V., Pilipenko V.A., Dobrovolsky M.N., Zaitsev A.N., Marshalko E.E., Database of geomagnetic ob-servations in Russian Arctic and its application for estimates of the space weather impact on technologi-cal systems, Solar-Terrestrial Physics, 2022, vol. 8, no. 1, pp. 39-50. DOI: 10.12737/stp-81202205

Kunitsyn V.E., Shalimov S.L., Ultralow-frequency variations of the magnetic field during the propagation of acoustic-gravitaty waves in the ionosphere, Moscow University Physics Bulletin, 2011, vol. 66, no. 5, pp. 485-488. DOI: 10.3103/S0027134911050080

Love J.J., Chulliat A., An international network of magnetic observatories, EOS, 2013, vol. 94, no. 42, pp. 373-374. DOI: 10.1002/2013EO420001

Martines-Bedenko V.A., Pilipenko V.A., Shiokawa K., Akbashev R.R., Electromagnetic ULF/ELF oscillations caused by the eruption of the Tonga volcano, Solar-Terrestrial Physics, 2023, vol. 9, no. 1, pp. 51-59.

Riabova S.A., Geomagnetic effect of the strong 2011 Tohoku earthquake, Gornyi informatsionno-analiticheskii byulleten' (Mining information and analytical bulletin), 2019, no. 4, pp. 137-151. [In Rus-sian]. DOI: 10.25018/0236-1493-2019-04-0-137-151

Riabova S.A., Shalimov S.L., Geomagnetic variations observed on the Earth’s surface and associated with strong earthquakes, Izvestiya, Physics of the Solid Earth, 2022, vol. 58, no. 4, pp. 469-483.

Romanova N.V., Pilipenko V.A., Stepanova M.V., On the magnetic precursor of the Chilean earthquake of Feb-ruary 27, 2010 , Geomagnetism and Aeronomy, 2015, vol. 55, no. 2, pp. 219-222.

Sobisevich A.L., Sobisevich L.E., Kanonidi K.K., Likhodeev D.V., Gravimagnetic perturbations preceding earth-quakes, Doklady Earth Sciences, 2017, vol. 475, no. 2, pp. 891-894.

Sobisevich L.E., Seismogravitational processes and gravitomagnetic disturbances accompanying geophysical catastrophes, Geofizika (Geophysics), 2020, no. 1, pp. 70-76. [In Russian].

Soloviev A.A., Geomagnetic effect of the earthquakes Mw = 7.5–7.8 in Turkey on February 6, 2023, Doklady Earth Sciences, 2023, vol. 511, no. 1, pp. 578-584. DOI: 10.1134/S1028334X23600731

Spivak A.A., Riabova S.A., Geomagnetic variations during strong earthquakes, Izvestiya, Physics of the Solid Earth, 2019, vol. 55, no. 6, pp. 811-820.

Spivak A.A., Riabova S.A., Geomagnetic effect of earthquakes, Doklady Earth Sciences, 2019, vol. 488, no. 1, pp. 1107-1110.

Spivak A.A., Riabova S.A., Rybnov Y.S., Kharlamov V.A., Geophysical effects of the November 26, 2019, earthquake in Albania, Doklady Earth Sciences, 2020, vol. 491, no. 1, pp. 155-159.

Surkov V.V., Pilipenko V.A., Magnetic effects due to earthquakes and underground explosions: a review, Annali di Geofisica, 1997, vol. 40, no. 2, pp. 227-239. DOI: 10.4401/ag-3904

Surkov V.V., Pilipenko V.A., Sinha A.K., Possible mechanisms of co-seismic electromagnetic effect, Acta Ge-odaetica et Geophysica, 2018, vol. 53, no. 1, pp. 157-170. DOI: 10.1007/s40328-018-0211-6

Tanskanen E.I., A comprehensive high-throughput analysis of substorms observed by IMAGE magnetometer network: Years 1993-2003 examined, Journal of Geophysical Research: Space Physics, 2009, vol. 114, 11 p. DOI: 10.1029/2008JA013682