Physical mechanism of ionospheric total electron content perturbations over a seismoactive region

Ruzhin, Yu. Ya.; Сорокин, В. М.; Yashchenko, A. K.

doi:10.1134/s001679321403013x

Cited by 13 publications

(19 citation statements)

References 18 publications

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“…The ionospheric TEC perturbation due to seismic activity can be observed within a horizontal scale of 1000 km from the seismic region, i.e., the earthquake epicenter. Observations also show that the TEC can either grow or diminish (or both) in the perturbed region [ Ruzhin et al , ]. Perevalova et al [] observed that there is a threshold magnitude (near 6.5) below which there is no pronounced earthquake‐induced wave TEC disturbances.…”

Section: Summary and Discussionmentioning

confidence: 99%

Tropical cyclone effects on the equatorial ionosphere: First result from the Indian sector

et al. 2016

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Ionospheric response to the effects of tropical cyclone (TC) “Mahasen” in 2013 and Hudhud in 2014 is studied on the equatorial ionosphere over the Indian sector for the first time using Global Positioning System‐derived total electron content (TEC) data. We observed an anomalous decrease of 3.8 TEC unit (1 TECU = 1016 el m−2) in vertical TEC (VTEC) value from the monthly mean for TC Mahasen and 2.1 TECU for TC Hudhud on the day of the landfall. We have also observed similar VTEC depletion of 1.5, 1.9, and 2.1 TECU for three different receivers on the landfall day for TC Vongfong over Japan. This anomalous decrease is observed over a wide zone around the trajectory of the cyclone during the active cyclonic storm stage. This observed anomaly might be the result of combined effect of TC‐inspired gravity waves, ejection of neutral particles from the terminator of a TC, and lightning electric fields which redistribute the chemical constituents of the ionosphere by increasing the number of neutral particles at different ionospheric heights, thus decreasing the TEC over the satellite‐receiver path.

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Section: Summary and Discussionmentioning

confidence: 99%

Tropical cyclone effects on the equatorial ionosphere: First result from the Indian sector

et al. 2016

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“…Ruzhin et al (2014) found a mechanism of the disturbance of the total electron content (TEC) of the ionosphere during the amplification of seismic activity. The spatial distri bution of TEC disturbance was shown to result from heating of the ionosphere by the electric current and from the plasma drift in the electric field of this cur rent.…”

Section: Ionospheric Irregularities Associated With Current Disturbanmentioning

confidence: 99%

Electrodynamic model of atmospheric and ionospheric processes on the eve of an earthquake

Сорокин

Ruzhin

2015

Geomagn. Aeron.

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Electric field generation and its accompanying phenomena in the atmosphere-ionosphere system have been intensively studied in recent years. This paper considers the results of these studies, which have served as the physical basis for the model of lithosphere-ionosphere coupling. According to our model, the intensive processes in the lower atmosphere and lithosphere have an electrodynamic effect on the ionospheric plasma. The model was used to conduct theoretical studies of plasma and electromagnetic effects accompa nying the generation of conduction current in the global circuit. It has been shown that the electrodynamic model of the influence of seismic and meteorological processes on cosmic plasma can serve as a physical basis for a satellite system to monitor earthquake precursors and the catastrophic phase of typhoon development. The model makes it possible to couple the satellite data of electromagnetic and plasma measurements with electrophysical and meteorological characteristics of the lower atmosphere at the stage of earthquake prepa ration and typhoon initiation. The model suggests that the numerous effects in the cosmic plasma have a sin gle source: a change in the conduction current flowing in the atmosphere-ionosphere circuit.

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“…An increase in aerosols concentration near the Earth's surface by several times leads to a relative TEC variation of several tens of percent. The characte-ristics of perturbation depend on the ratio between these effects and the example of calculation results shows that a reasonable quantity of injected aerosols in the atmosphere is accompanied by the TEC perturbation of observed amplitude [58].…”

Section: The Reaction Of the Ionosphere To The Penetration Of An Elecmentioning

confidence: 91%

A Review on Electrodynamic Influence of Atmospheric Processes to the Ionosphere

Сорокин¹,

Chmyrev²,

Hayakawa³

2020

OJER

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This work is an attempt to critically analyze the existing theoretical models of the impact of earthquake preparation processes on the state of the earth's atmosphere and ionosphere in the zone of growing seismic activity, as well as the mechanisms of formation and transfer of disturbances in various media over the earthquake center. The determining factor (criterion) of the analysis is the degree of compliance of the simulation results with experimental data obtained at various phases of earthquake development by direct and remote diagnostic methods using ground and aerospace technologies. The key role is played by the model's compliance with the results of measuring electric fields and currents in the near-ground atmosphere and ionosphere, small-scale ionospheric inhomogeneities and correlated field-aligned currents and electromagnetic ULF/ELF emissions. A full-fledged model should also explain the origin of such seismic related phenomena as the generation in the troposphere and over-horizon propagation of pulsed VHF radiation, thermal effects and associated IR emissions as well as the modification of plasma distribution in the D, E and F layers of the ionosphere. The use of this criterion in the analysis allowed us to identify a theoretical model that most fully describes the totality of the above-mentioned experimental data within a single physical mechanism. This is an electrodynamic model based on the perturbation of the conductivity current in the global atmosphere-ionosphere electric circuit due to the injection of charged aerosols into the atmosphere during the preparation and development of an earthquake. The present paper describes this model and the formation mechanisms of related phenomena in the atmosphere and ionosphere, which can be considered as short-term precursors to earthquakes.How to cite this paper: Sorokin, V.M., Chmyrev, V.M. and Hayakawa, M. (2020) A Review on Electrodynamic Influence of Atmospheric Processes to the Ionosphere.

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Physical mechanism of ionospheric total electron content perturbations over a seismoactive region

Cited by 13 publications

References 18 publications

Tropical cyclone effects on the equatorial ionosphere: First result from the Indian sector

Tropical cyclone effects on the equatorial ionosphere: First result from the Indian sector

Electrodynamic model of atmospheric and ionospheric processes on the eve of an earthquake

A Review on Electrodynamic Influence of Atmospheric Processes to the Ionosphere

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