Investigation of the characteristics of geoelectric field signals prior to earthquakes using adaptive STFT techniques

Astuti, Winda and Sediono, Wahju and Akmeliawati, Rini and Aibinu, Abiodun Musa and Salami, Momoh Jimoh Emiyoka (2013) Investigation of the characteristics of geoelectric field signals prior to earthquakes using adaptive STFT techniques. Natural Hazards and Earth System Sciences, 13 (6). pp. 1679-1686. ISSN 1561-8633

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Abstract

An earthquake is one of the most destructive natural disasters that can occur, often killing many people and causing large material losses. Hence, the ability to predict earthquakes may reduce the catastrophic effects caused by this phenomenon. The geoelectric field is a feature that can be used to predict earthquakes (EQs) because of significant changes in the amplitude of the signal prior to an earthquake. This paper presents a detailed analysis of geoelectric field signals of earthquakes which occurred in 2008 in Greece. In 2008, 12 earthquakes occurred in Greece. Five of them were recorded with magnitudes greater than Ms = 5R (5R), while seven of them were recorded with magnitudes greater than Ms = 6R (6R). In the analysis, the 1st significant changes of the geoelectric field signal are detected. Then, the signal is segmented and windowed. The adaptive short-time Fourier transform (adaptive STFT) technique is then applied to the windowed signal, and the spectral analysis is performed thereafter. The results show that the 1st significant changes of the geoelectric field prior to an earthquake have a significant amplitude frequency spectrum compared to other conditions, i.e. normal days and the day of the earthquake, which can be used as input parameters for earthquake prediction.

Item Type:	Article (Journal)
Additional Information:	6584/30091
Uncontrolled Keywords:	Earthquake, Seismic Electric Signal (SES), Adaptive Short Time Fourier Transform (Adaptive STFT), Geoelectric Field
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA495 Disasters and engineering T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7800 Electronics. Computer engineering. Computer hardware. Photoelectronic devices > TK7885 Computer engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechatronics Engineering
Depositing User:	Dr.-Ing. Wahju Sediono
Date Deposited:	23 Jul 2013 10:58
Last Modified:	27 Jul 2013 09:18
URI:	http://irep.iium.edu.my/id/eprint/30091

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