Variations in thunderstorm VLF emissions propagating over epicenters of earthquakes

Mullayarov, V. A.; Karimov, R. R.; Kozlov, V. I.

doi:10.1016/j.jastp.2007.06.001

Cited by 10 publications

(8 citation statements)

References 24 publications

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“…However, as follows from our previous results (Mullayarov et al, 2007, the increases of the amplitude of atmospherics on the days after the EQs are registered without accompanying geomagnetic activity. But the question of connection between the EQs and the geomagnetic disturbances is worth considering.…”

Section: Discussionsupporting

confidence: 80%

“…According to our previous results (Mullayarov et al, 2007, such behavior consisting in a 1-2 day delay of response of the ionosphere to the EQ is almost typical. The peaks of 25 February 2011 and 28 February 2011 preceding the EQs are marked in Fig.…”

Section: Resultssupporting

confidence: 65%

“…In winter the maximum distance to the source of received signals (determined by the signal-to-noise ratio) is about 12 000 km. However, the distance to the EQ epicenter confidently estimated through disturbances of the lower ionosphere on the atmospherics propagation path, as previously shown in our studies (Mullayarov et al, 2007, is limited by the values of 3500-4000 km. At distances over 4000 km the number of amplitude variations of the atmospherics increases.…”

Section: Data and Analysis Methodssupporting

confidence: 57%

“…The analysis of variations of hourly amplitude values of the atmospherics passing above the area of EQ epicenters near the Japanese islands in March 2011 shows that during the strong EQs on 9 and 11 March a typical pattern of variations, which we associate with seismic events, was observed 12 days before them (Mullayarov et al, 2007. The effects of EQs in the form of increase in the amplitude were observed for each of the following events: for the first EQ, one day later, during certain hours, and for the second, the strongest EQ, two days later (13 March), practically all day long.…”

Section: Discussionmentioning

confidence: 85%

“…As an additional method, we propose monitoring seismic disturbances in the lower ionosphere through natural radio emissions, i.e. electromagnetic signals of lightning discharges (atmospherics) (Mullayarov et al, 2007). The method allows for the carrying out the azimuthal scanning of the disturbances from a single receiving point, and during the summer thunderstorm season there is a possibility to roughly locate the disturbance area.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Ionospheric effects of earthquakes in Japan in March 2011 obtained from observations of lightning electromagnetic radio signals

Mullayarov

Argunov

Abzaletdinova

et al. 2012

Nat. Hazards Earth Syst. Sci.

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Abstract. Manifestations of disturbances in the lower ionosphere caused by a complex series of earthquakes (the strong earthquakes with M = 7.3 and M = 9 -known as M9 Tohoku EQ -and the subsequent aftershocks) that occurred near the Japanese island of Honshu have been considered with the use of monitoring measurements of the amplitude of lightning electromagnetic signals (atmospherics) received at Yakutsk. Some data of one-point lightning location systems have been compared with the data of the WWLLN network.The analysis of hourly values variation of the atmospheric amplitude passing over the earthquake epicenters shows that during the initial period (the strong earthquakes on 9 March and 11 March) a typical pattern of variations was observed. It was manifested in the increased amplitude after both earthquakes. There were also possible precursors in the form of the increase in amplitude 12-14 days before the events. Though the focuses of these earthquakes were very close to each other, the registration of both precursors may indicate that both of the lithospheric processes developed to a certain extent independently.During all the days of the atmospheric amplitude enhancement the quasi-periodic variation trains were recorded. Together with the delay of earthquake effects relative to the time of the events, they may testify in favor of transferring the energy of lithospheric processes into the lower ionosphere by means of atmospheric gravity waves.

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Section: Discussionsupporting

confidence: 80%

Section: Resultssupporting

confidence: 65%

Section: Data and Analysis Methodssupporting

confidence: 57%

Section: Discussionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ionospheric effects of earthquakes in Japan in March 2011 obtained from observations of lightning electromagnetic radio signals

Mullayarov

Argunov

Abzaletdinova

et al. 2012

Nat. Hazards Earth Syst. Sci.

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Remote sensing of seismic disturbances in the lower ionosphere according to observations of lightning electromagnetic signals

Argunov

Karimov

2018

E3S Web Conf.

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Features of the remote sensing of seismic disturbances in the lower ionosphere are considered according to observation data of lightning electromagnetic signals passing over the earthquake epicentre, in Yakutsk. The technique has the ability to scan a large seismically active region or even several regions directly from one point, though in some azimuths there are limitations due to insufficiently high lightning activity. In last case, the receiving of signals at several spaced points is used.

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Equipment and method for remote monitoring of seismic activity by VLF electromagnetic signals

Argunov

Karimov

Mochalov

2018

IOP Conf. Ser.: Earth Environ. Sci.

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Variations in thunderstorm VLF emissions propagating over epicenters of earthquakes

Cited by 10 publications

References 24 publications

Ionospheric effects of earthquakes in Japan in March 2011 obtained from observations of lightning electromagnetic radio signals

Ionospheric effects of earthquakes in Japan in March 2011 obtained from observations of lightning electromagnetic radio signals

Remote sensing of seismic disturbances in the lower ionosphere according to observations of lightning electromagnetic signals

Equipment and method for remote monitoring of seismic activity by VLF electromagnetic signals

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