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Seismo-ionospheric Coupling Correlation Analysis of Earthquakes in Greece, Using Empirical Mode Decomposition : Volume 16, Issue 1 (19/02/2009)

By Tsolis, G. S.

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Book Id: WPLBN0003981826
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Seismo-ionospheric Coupling Correlation Analysis of Earthquakes in Greece, Using Empirical Mode Decomposition : Volume 16, Issue 1 (19/02/2009)  
Author: Tsolis, G. S.
Volume: Vol. 16, Issue 1
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2009
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Xenos, T. D., & Tsolis, G. S. (2009). Seismo-ionospheric Coupling Correlation Analysis of Earthquakes in Greece, Using Empirical Mode Decomposition : Volume 16, Issue 1 (19/02/2009). Retrieved from http://hawaiilibrary.net/


Description
Description: Aristotle University of Thessaloniki, Department of Electrical and Computer Engineering, 54006 Thessaloniki, Greece. Ionospheric variability as a result of earthquake events is a confirmed phenomenon as published in various seismo-ionospheric coupling studies. Generally, ionospheric variations resulting from earthquake activity are much weaker than disturbances generated by different sources, e.g. geomagnetic storms. However, geomagnetic storm disturbances exhibit more global behaviour, whereas seismo-ionospheric variations occur only locally in an area that is specified by the magnitude of the earthquake. Cross-correlation coefficient analysis is a technique proposed some years ago, and ensures cancelation of geomagnetic storm variations of the ionospheric plasma, provided that the measurements are taken from stations with similar behaviour in these phenomena. In this paper we will use the aforementioned technique for analyzing data from ionospheric stations in Rome and Athens, and apply it to a series of earthquakes in Greece. Considering the local behaviour of the seismo-ionospheric variations, we expect that the Athens station, which happens to be inside the area affected by the earthquake, will accurately capture the disturbances. Due to its distance from the activity, we also do not expect the Rome station measurements to be affected by the seismic events in Greece. In addition, due to the fact that ionospheric plasma parameters exhibit non-stationary and nonlinear behaviour, we propose a novel signal processing technique known as the Hilbert-Huang transform in order to denoise the data before we calculate the cross-correlation coefficient of the two signals. Results from our analysis are in accordance with previously-conducted studies covering the same topic, clearly demonstrating that there are ionospheric precursors 1 to 7 days prior to strong seismic events as well as 1 to 2 days following such events.

Summary
Seismo-ionospheric coupling correlation analysis of earthquakes in Greece, using empirical mode decomposition

Excerpt
% vor jede Referenz Davies, K.: Ionospheric Radio, Peregrinus Ltd., London, UK, 1990.; % vor jede Referenz Dobrovolsky, I. R., Zubkov, S. I., and Myachkin, V. I.: Estimation of the size of earthquake preparation zones, Pageoph., 117, 1025–1044, 1979.; % vor jede Referenz Flandrin, P., Rilling, G., and Gonçalvès, P.: Empirical Mode Decomposition as a filter bank, IEEE Signal Proc. Lett., 2003.; % vor jede Referenz Flandrin, P., Gonçalvès, P., and Rilling, G.: Detrending and denoising with Empirical Mode Decompositions, Eusipco, 12th European Signal Processing Conference, 6–10 September, Vienna, Austria, 2004.; % vor jede Referenz Gokhberg, M. B., Morgounov, V. A., and Pokhotelov, O. A.: Earthquake Prediction, Seismo-electromagnetic phenomena, Gordon and Breach Science Publishers, Amsterdam, 1995.; % vor jede Referenz Huang, N. E., Shen, Z., Long, S. R., Wu, M. L., Shih, H. H., Zheng, Q., Yen, N. C., Tung, C. C., and Liu, H. H.: The empirical mode decomposition and Hilbert spectrum for nonlinear and nonstationary time series analysis, P. Roy. Soc. Lond. A, 454, 903–995, 1998.; % vor jede Referenz Kouris, S. S., Spalla, P., and Zolesi, B.: Could ionospheric variations be precursors of a seismic event? A short discussion, Annals of Geophysics, Series/Report N44/2, 2001.; % vor jede Referenz Liu, J. Y., Chen, Y. I., Chuo, Y. J., and Tsai, H. F.: Variations of ionospheric total content during the Chi-Chi earthquake, Geophys. Res. Lett., 28, 1381–1386, 2001.; % vor jede Referenz Molchanov, O., Fedorov, E., Schekotov, A., Gordeev, E., Chebrov, V., Surkov, V., Rozhnoi, A., Andreevsky, S., Iudin, D., Yunga, S., Lutikov, A., Hayakawa, M., and Biagi, P. F.: Lithosphere-atmosphere-ionosphere coupling as governing mechanism for preseismic short-term events in atmosphere and ionosphere, Nat. Hazards Earth Syst. Sci., 4, 757–767, 2004.; % vor jede Referenz Pulinets, S.: Ionospheric precursors of earthquakes; Recent advances in theory and practical applications, TAO, 15(3), 413–435, 2004.; % vor jede Referenz Pulinets, S. A., Alekseev, V. A., Legenka, A. D., and Hegai, V. V.: Radon and Metallic Aerosols Emanation before Strong Earthquakes and their Role in Atmosphere and Ionosphere Modification, Adv. Space Res., 20, N11, 2173–2176, 1997.; % vor jede Referenz Pulinets, S. A., Gaivoronska, T. B., Leyva Contreras, A., and Ciraolo, L.: Correlation analysis technique revealing ionospheric precursors of earthquakes, Nat. Hazards Earth Syst. Sci., 4, 697–702, 2004.

 

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