Magnetic perturbations before the strong earthquakes

Guglielmi, A. V.; Зотов, О. Д.

doi:10.1134/s1069351312010065

Cited by 19 publications

(7 citation statements)

References 5 publications

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“…As is known, earthquakes can have an effect on geomagnetic variations. A number of studies have observed temporal variations in the value of the magnetic induction vector with different characteristic periods from a few minutes to hours, which may be associated with periods of preparation or relaxation of the crustal stress state [Guglielmi, Zotov, 2012;Chernogor, 2019]. The latter paper has identified trains of 400-900 s geomagnetic variations following an earthquake.…”

Section: Introductionmentioning

confidence: 98%

Variations of ionospheric and geomagnetic field parameters during the June 18, 2013 Bachat earthquake

Belinskaya

Kovalev

Semakov

et al. 2021

Solar-Terrestrial Physics

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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.

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Section: Introductionmentioning

confidence: 98%

Variations of ionospheric and geomagnetic field parameters during the June 18, 2013 Bachat earthquake

Belinskaya

Kovalev

Semakov

et al. 2021

Solar-Terrestrial Physics

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“…Поясним наш выбор радиальной компоненты B x как управляющего параметра, от которого зависит состояние геомагнитного поля. Как известно, ММП имеет секторную структуру [Паркер, 1965] [Guglielmi, Pokhotelov, 1996] (рис. 6, б).…”

Section: Introductionunclassified

“…Черные прямыелинии регрессии, аппроксимирующие экспериментальные точки ОБСУЖДЕНИЕ В силовом отношении ММП не оказывает особого влияния на динамику магнитосферы, однако оно играет ключевую роль в переносе импульса и энергии из солнечного ветра в магнитосферу. В частности, ММП обусловливает многообразие пространственно-временных режимов УНЧ-колебаний магнитосферы [Guglielmi, Pokhotelov, 1996], от которых, в свою очередь, возможно, зависят физические процессы в литосфере.…”

Section: Introductionunclassified

On possible relation of earthquakes with the sign change of the interplanetary magnetic field radial component

Зотов

Guglielmi

Silina

2021

Solnechno-Zemnaya Fizika

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This work is devoted to an experimental study of the possible relationship between earthquakes and interplanetary magnetic field (IMF) variations. For the analysis, we use world and regional catalogs of earthquakes and a catalog containing data on the IMF sector structure for several decades. The main methodological technique consists in a comparative analysis of the occurrence rate of earthquakes on the days when Earth crosses the boundary between IMF sectors with the days when Earth is inside the sector. The sign of the IMF radial component is utilized as an indicator of the events on which the oscillation mode of Earth's magnetosphere depends. The sign reversal signals the probable crossing of the boundary between the IMF sectors by Earth, or, in other words, the crossing of the heliospheric current sheet by Earth. The hypothesis about the relationship between IMF variations and seismic activity is that IMF fluctuations, penetrating into the magnetosphere, excite ULF electromagnetic oscillations in the magnetosphere, which, in principle, can affect the physical processes in upcoming earthquake sources. We have found a weak, but statistically significant relationship between IMF variations and seismic activity. We also consider other IMF parameters that control ultra-low-frequency oscillations of the geomagnetic field.

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“…There is an extensive literature on this subject. We use here only some recent publications [Husamiddinov, 2000;Haya-kawa, 2001;Duma, Ruzhin, 2003;Zakrzhevskaya, Sobolev, 2004;Sobisevich, Kanonidi, Sobisevich, 2010 ;Masci, 2011;Adushkin et al, 2012;Guglielmi, Zotov, 2012;Schekotov, 2012;Buchachenko, 2014Buchachenko, , 2019Guglielmi et al, 2015;Tarasov, 2019].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Sun on Earthʼs Seismicity

Guglielmi

Klain

2020

Solar-Terrestrial Physics

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For the experimental study of the relationship between earthquakes and solar activity, we introduce the idea of the statistical sum Z of earthquake ensemble. A number of numerical parameters of seismicity (average planetary magnitude, entropy, fluctuations of magnitude) are expressed through Z. A severe restriction is, however, imposed on the magnitude during the formation of the ensemble. We propose an alternative method. It does not have this specific restriction, although it allows us to calculate only one numerical parameter, namely the global daily magnitude Mg. Over the 20-year period from 1980 to 1999, 7300 values of Mg have been calculated. The comparison between the Mg values and Wolf numbers W made it possible to determine the effect of the Sun on earthquakes at a statistically significant level.

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Magnetic perturbations before the strong earthquakes

Cited by 19 publications

References 5 publications

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

On possible relation of earthquakes with the sign change of the interplanetary magnetic field radial component

Effect of the Sun on Earthʼs Seismicity

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