Theoretical model of DC electric field formation in the ionosphere stimulated by seismic activity

Сорокин, В. М.; Chmyrev, V. M.; Yaschenko, A.K.

doi:10.1016/j.jastp.2005.07.013

Cited by 71 publications

(40 citation statements)

References 13 publications

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“…Sorokin et al (2005) have shown that the external current of EMF depends on the vertical component of electric field on the Earth's surface. Such a feedback is caused by the formation of a potential barrier on the ground-atmosphere boundary at the passage of upward moving charged aerosols through this boundary, and it leads to limitation of vertical electric field on the Earth's surface.…”

Section: Breakdown Electric Field In the Lower Atmospherementioning

confidence: 99%

Model of electric discharge formation in the lower atmosphere over a seismic region

Сорокин

Ruzhin

Кузнецов

et al. 2012

Geomatics, Natural Hazards and Risk

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The altitude distribution of seismic-related direct current (DC) electric field in the Earth-ionosphere layer is computed. This field is generated by the conductivity current flowing in closed atmosphere-ionosphere electric circuit at the preparatory stage of an earthquake. The source of the current is electromotive force caused by upward convective transport and gravitational sedimentation of charged aerosols injected into the atmosphere by soil gases in the course of intensification of seismic processes. It is shown from the solution of a selfconsistent set of non-linear equations that pre-earthquake DC electric field enhancement in the atmosphere can reach breakdown value at the altitudes 1-10 km and initiate numerous chaotic electrical discharges in this region. The generation theory of very high-frequency electromagnetic radiation by such discharges is developed. The calculated spectrum and other characteristics of the radiation are in a good agreement with experimental data on radio emission at the frequencies of *41 and *53 MHz that have been observed on several stations of Crete Island in connection with impending earthquakes.

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Section: Breakdown Electric Field In the Lower Atmospherementioning

confidence: 99%

Model of electric discharge formation in the lower atmosphere over a seismic region

Сорокин

Ruzhin

Кузнецов

et al. 2012

Geomatics, Natural Hazards and Risk

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“…(15), j e is the total external current, and r is the coordinate in horizontal direction. Sorokin et al (2005a) and Sorokin et al (2005b) have shown that external current depends on the vertical component of electric field on the Earth's surface. Such a feedback is caused by the formation of potential barrier on the ground-atmosphere boundary at the passage of upward moving charged aerosols through this boundary and leads to limitation of vertical electric field on the Earth surface.…”

Section: Electric Fieldmentioning

confidence: 99%

“…At the same time this field stimulates the going out on the surface of negatively charged particles. In the presence of such a coupling the dependence of external currents magnitude on vertical component of the electric field on the surface can be presented qualitatively by the following formulas (Sorokin et al, 2005a):…”

Section: Electric Fieldmentioning

confidence: 99%

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A perturbation of DC electric field caused by light ion adhesion to aerosols during the growth in seismic-related atmospheric radioactivity

Сорокин

Yaschenko

Hayakawa

2007

Nat. Hazards Earth Syst. Sci.

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Abstract. The influence of variations in conductivity and external electric current variations in the lower atmosphere on DC electric field over a seismic region is investigated. The external current is formed with the occurrence of convective upward transport of charged aerosols and their gravitational sedimentation in the atmosphere. This effect is related with the occurrence of ionization source due to seismic-related emanation of radon and other radioactive elements into the lower atmosphere. An increase in atmosphere radioactivity level results in the appearance of additional sources of ionization, and altitude dependence of the ion formation rate is calculated. Ionization source varies the atmospheric conductivity and the external current through appearance of ions with equilibrium number density and their adhesion to aerosols. We have calculated the perturbation of conductivity and external electric current as a function of altitude. Variation of conductivity and external current in the lower atmosphere leads to a perturbation of electric current which flows in the global atmosphere-ionosphere circuit. Finally, perturbations of DC electric field both on the Earth's surface and in the ionosphere are estimated.

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“…Sorokin et al (2001) and Sorokin and Chmyrev (2002) have formulated the electrodynamic model for atmosphere-ionosphere coupling. Sorokin et al (2005) have constructed the theoretical model of the conductivity-current distribution in the atmosphere and ionosphere, initiated by external electric current. According to this model the external current arises as a result of emanation of charged aerosols transported in the atmosphere by soil gases and the subsequent process of upward transfer, gravitational sedimentation and charge relaxation.…”

mentioning

confidence: 99%

Changes in total electron content associated with earthquakes (M > 5) observed from GPS station, Varanasi, India

Priyadarshi

Kumar

Singh

2011

Geomatics, Natural Hazards and Risk

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The total electron content (TEC) derived from the global positioning system (GPS) at Varanasi (latitude 25.38 N, longitude 82.998 E), India has been measured during 2007 and 2010. We have chosen nine earthquakes (M 4 5) that occurred within 2000 km of Varanasi during 2007 and 2010 to study the changes in TEC associated with these earthquakes. A monthly median (MM) of the TEC and associated inter quartile range (IQR), upper bound (UB) and lower bound (LB) are utilized as a reference for identifying abnormal signals during all nine earthquakes. The results show anomalous reductions and enhancements in the TEC. These pre-earthquake ionospheric anomalies appear within 5 days prior to earthquakes. A possible mechanism responsible for ionospheric anomalies associated with earthquakes is discussed.

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Theoretical model of DC electric field formation in the ionosphere stimulated by seismic activity

Cited by 71 publications

References 13 publications

Model of electric discharge formation in the lower atmosphere over a seismic region

Model of electric discharge formation in the lower atmosphere over a seismic region

A perturbation of DC electric field caused by light ion adhesion to aerosols during the growth in seismic-related atmospheric radioactivity

Changes in total electron content associated with earthquakes (M > 5) observed from GPS station, Varanasi, India

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