Preprints
https://doi.org/10.5194/npgd-1-977-2014
https://doi.org/10.5194/npgd-1-977-2014
19 May 2014
 | 19 May 2014
Status: this preprint was under review for the journal NPG but the revision was not accepted.

On the possibility of precursors of earthquakes in VLF range observed by DEMETER Satellite

D. K. Sondhiya, S. Kumar, and A. K. Gwal

Abstract. Very Low Frequency (VLF) disturbances in the ionospheric electric field observed by DEMETER satellite prior to three different earthquakes that occurred during the years 2008–2009 have been presented. The electromagnetic wave data has been analyzed for few days before the earthquake with special attention to the variation in spectral characteristics and non-linear effects using the statistical and wavelet based techniques. Results indicate that the earthquake preparation process may disturb the ionospheric plasma and these disturbances can reach the non-linear stage leading to the strong variations in the electromagnetic field and plasma parameters. The enhancement in statistical parameters shows the coherent structure and intermittent phenomenon which is the signature of turbulence. The characteristics features of VLF disturbances have further been studied using the wavelet and bispectral analysis tools which provide useful information on the plasma turbulence.

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D. K. Sondhiya, S. Kumar, and A. K. Gwal
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
 
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
D. K. Sondhiya, S. Kumar, and A. K. Gwal
D. K. Sondhiya, S. Kumar, and A. K. Gwal

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