Fractal analysis for VHF electromagnetic noises and the identification of preseismic signature of an earthquake

Yonaiguchi, N.; Ida, Y.; Hayakawa, Masashi; Masuda, Shin

doi:10.1016/j.jastp.2007.08.002

Cited by 34 publications

(26 citation statements)

References 19 publications

(20 reference statements)

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“…Hayakawa et al (1999) made the first attempt of fractal analysis of the ULF data for the 2003 Guam EQ event, and since then there has been an increased interest in this fractal analysis as applied to seismogenic emissions not only in the ULF frequency range (Smirnova et al, 2001Gotoh et al, 2003Ida et al, 2005;Ida and Hayakawa, 2006;Hayakawa and Ida, 2008), but also in different frequency ranges (DC, VHF etc.) (Eftaxias et al, 2004;Varotsos, 2005;Yonaiguchi et al, 2007).…”

Section: Fractal Analysis Of Ulf Geomagnetic Datamentioning

confidence: 99%

Fractal analysis of ULF electromagnetic emissions in possible association with earthquakes in China

Ida

Yang

et al. 2012

Nonlin. Processes Geophys.

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Abstract. The long-term data (during the period of 1 March 2003 through 31 December 2006) of ULF geomagnetic variations observed at Kashi station (geographic coordinates: 39.5 • N, 76.0 • E) in China have been used to investigate the long-term variation of fractal dimension of ULF emissions. We have studied the changes in fractal dimension in association with several earthquakes around the observation station. It is then found that a significant change (or decrease) in the fractal dimension of the Z component took place before the 1 September 2003 earthquake, which lends a further support to our previous finding based on our improved polarization analysis for the same earthquake. The results obtained are discussed in the contexts of a few aspects (detectability of seismogenic emissions, comparison with previous results by other analysis methods, the importance of fractal analysis in the nonlinear process of the lithosphere and earthquake prediction).

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Section: Fractal Analysis Of Ulf Geomagnetic Datamentioning

confidence: 99%

Fractal analysis of ULF electromagnetic emissions in possible association with earthquakes in China

Ida

Yang

et al. 2012

Nonlin. Processes Geophys.

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“…As is shown in Yonaiguchi et al (2007), the use of fractal analysis enables us to sort out only the lithospheric VHF emissions organized by the SOC process among a few possible noise sources because other noise sources do not follow the SOC process.…”

Section: Fractal Analysis Of Vhf Emissionsmentioning

confidence: 99%

“…However, we have to think of the secondary effect in such a way that those VHF emissions are generated in the Earth's surface or in the atmosphere due to the precursory tectonic effect of an EQ. This paper is intended to supplement our recent paper by Yonaiguchi et al (2007), in which they have studied the nonlinear process for seismogenic VHF noise using only the multi-fractal detrended analysis. In order to provide further support to the result by Yonaiguchi et al (2007), we try to show the results by using different kinds of fractal analysis and comparing those results in order to validate their previous results.…”

Section: Introductionmentioning

confidence: 99%

A comparison of different fractal analyses for VHF electromagnetic emissions and their self-organization for the off-sea Miyagi-prefecture earthquake

Yonaiguchi

Ida

Hayakawa

et al. 2007

Nat. Hazards Earth Syst. Sci.

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Abstract. The VHF electromagnetic noise intensity data at several stations in the Tohoku area of Japan during the period of a rather large (with magnitude of 7.2) earthquake (Miyagi-ken oki earthquake) taken place on 16 August 2005, are analyzed by means of different fractal analysis methods, including (1) spectral slope estimation, (2) multi-fractal detrended fluctuation analysis and (3) multi-fractal wavelet transform modulus maxima method. It seems to the authors that there is no definite analysis method for the analysis of any seismogenic phenomenon, so that the only way we have to take, is to apply different methods to the same data for the detailed comparison of the results. This comparison enables us to deduce the properties commonly observed by the above methods. Because the most important feature common to these three methods, is that significant changes in fractal scaling characteristics are observed just during the earthquake (mainly before the earthquake) only at one station of Kunimi. Finally, we can come to the definite conclusion on the self-organization of VHF emissions only at one station in the present case.

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“…The EM seismic precursors include ultra-low frequencies (ULF) from 0.001 to 1 Hz [1][2][3][4][5][6][7], low frequencies (LF) from 1 to 10 kHz [6,[8][9][10][11][12][13], high frequencies (HF) from 40 to 60 MHz [6,8,[14][15][16][17] and very high frequencies (VHF) up to 300 MHz [18]. A key strategy for recognising the EM pre-earthquake precursors is the direct detection of EM radiation emission from the lithosphere [5].…”

Section: Introductionmentioning

confidence: 99%

Fractal Analysis of Pre-Seismic Electromagnetic and Radon Precursors: A Systematic Approach

Dimitrios¹,

Ermioni²,

HY³

et al. 2016

J Earth Sci Clim Change

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Fractal analysis for VHF electromagnetic noises and the identification of preseismic signature of an earthquake

Cited by 34 publications

References 19 publications

Fractal analysis of ULF electromagnetic emissions in possible association with earthquakes in China

Fractal analysis of ULF electromagnetic emissions in possible association with earthquakes in China

A comparison of different fractal analyses for VHF electromagnetic emissions and their self-organization for the off-sea Miyagi-prefecture earthquake

Fractal Analysis of Pre-Seismic Electromagnetic and Radon Precursors: A Systematic Approach

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