Study of Ionospheric Perturbations during Strong Seismic Activity by Correlation Analysis Method

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Study of Ionospheric Perturbations during Strong Seismic Activity by Correlation Analysis Method

Author Affiliations

¹Space Science Laboratory, Department of Physics Barkatullah University Bhopal-462026, INDIA

Res. J. Recent Sci., Volume 1, Issue (1), Pages 2-9, January,2 (2012)

Abstract

Present paper deals the variation in NmF2 (Maximum electron density of F2 layer) parameter by correlation technique at the time of strong seismic activity. We used Ionosonde data which installed at different locations for analysis purpose. We used two ionosonde receivers, where one is in the earthquake preparation zone and the other is out side of it. By correlation technique we calculate Auto Correlation Coefficient and Cross-Correlation Coefficient. Results of the study showed the anomaly in Correlation Coefficients related to NmF2 parameter few days before the seismic event. This fact can be regarded as precursory phenomena. The anomaly in the F-layer density may be interpreted as a result of associated seismic electric field generated by internal gravity waves. It may be due to the inflow of energy from the earth and then propagated upward, which perturb the F-region of ionosphere. This study may be beneficial for prediction of earthquake.

References

Pulinets S.A. and Legen’ka A.D., Spatial – temporal characteristics of the large scale disturbances of electron concentration observed in the F-region of the ionosphere before strong earthquakes. Kosmicheskie issledovaniya (Cosmic Research), 41(3), 1-10 (2003)
Evans J.V., Satellite beacon contributions to the structure of the ionosphere, Rev. Geophys. Space Phys., 15, 325-350
Calais E. and Minster J.B., GPS detection of ionospheric perturbations following the January 17, 1964, Northbridge earthquake, Geophys, Res. Lett.,22, 1045-1048 (1995)
Zaslavski Y., Parrot M. and Blanc E., Analysis of TEC measurements above active seismic regions, Physics of the earth and Planetary Interiors, 105, 219-228 (1998)
Liu J.Y., Chuo Y.J., Pulinets S.A., Tsai H.F. and Zeng X., A study on the TEC perturbations prior to the Rei-Li, Chi-Chi and Chai-Yi earthquakes, In “Seismo- Electromagnetics: Iithosphere-Atmosphere- Ionosphere Coupling”, Eds Hayakawa, M. and Molchanov O.A., TERRAPUB, Tokyo, 297-301 (2002)
Liu J.Y., Chuo Y.J., Shan S.J., Tsai Y.B. and Pulinets S.A., Pre- earthquake ionospheric anomalies monitored by GPS TEC, Ann., Geophys., 22, 1585-1593 (2004)

[ref1] Pulinets S.A. and Legen’ka A.D., Spatial – temporal characteristics of the large scale disturbances of electron concentration observed in the F-region of the ionosphere before strong earthquakes. Kosmicheskie issledovaniya (Cosmic Research), 41(3), 1-10 (2003)

[ref2] Evans J.V., Satellite beacon contributions to the structure of the ionosphere, Rev. Geophys. Space Phys., 15, 325-350

[ref3] Calais E. and Minster J.B., GPS detection of ionospheric perturbations following the January 17, 1964, Northbridge earthquake, Geophys, Res. Lett.,22, 1045-1048 (1995)

[ref4] Zaslavski Y., Parrot M. and Blanc E., Analysis of TEC measurements above active seismic regions, Physics of the earth and Planetary Interiors, 105, 219-228 (1998)

[ref5] Liu J.Y., Chuo Y.J., Pulinets S.A., Tsai H.F. and Zeng X., A study on the TEC perturbations prior to the Rei-Li, Chi-Chi and Chai-Yi earthquakes, In “Seismo- Electromagnetics: Iithosphere-Atmosphere- Ionosphere Coupling”, Eds Hayakawa, M. and Molchanov O.A., TERRAPUB, Tokyo, 297-301 (2002)

[ref6] Liu J.Y., Chuo Y.J., Shan S.J., Tsai Y.B. and Pulinets S.A., Pre- earthquake ionospheric anomalies monitored by GPS TEC, Ann., Geophys., 22, 1585-1593 (2004)