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On the Possibility of Precursors of Earthquakes in Vlf Range Observed by Demeter Satellite : Volume 1, Issue 1 (19/05/2014)

By Sondhiya, D. K.

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Book Id: WPLBN0004020116
Format Type: PDF Article :
File Size: Pages 21
Reproduction Date: 2015

Title: On the Possibility of Precursors of Earthquakes in Vlf Range Observed by Demeter Satellite : Volume 1, Issue 1 (19/05/2014)  
Author: Sondhiya, D. K.
Volume: Vol. 1, Issue 1
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Gwal, A. K., Sondhiya, D. K., & Kumar, S. (2014). On the Possibility of Precursors of Earthquakes in Vlf Range Observed by Demeter Satellite : Volume 1, Issue 1 (19/05/2014). Retrieved from

Description: Space Science Laboratory, Department of Physics, Barkatullah University, Bhopal-462026, India. 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.

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

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