Analysis of Non-Uniform Scaling Features in Ultra Low Frequency Geomagnetic Signals and Correlation with Seismicity

Author

Telesca, Luciano ; Hattori, Katsumi

Author_Institution

Consiglio Naz. delle Ric., Ist. di Metodologie per l´´Analisi Ambientale, Tito, Italy

fYear

2007

fDate

24-27 Nov. 2007

Firstpage

488

Lastpage

491

Abstract

The scaling properties of the time dynamics of Ultra Low Frequency (ULF) geomagnetic data observed during 2000 and 2001 at Izu Peninsula in Japan are analyzed. The 50 Hz data and then resampled at 1 Hz were used for the analysis performed in the present study. On the base of the detrended fluctuation analysis (DFA), which is a powerful tool to detect and investigate time-scaling behavior in nonstationary signals, deviations from uniform power-law scaling were identified and quantified by means of an instability index. Our results point out to significantly high instability index in ULF geomagnetic data in relationship with the occurrence of large earthquakes and intense seismic clusters.

Keywords

earthquakes; geomagnetic variations; geophysical signal processing; seismology; Izu Peninsula; Japan; ULF signals; detrended fluctuation analysis; earthquake occurrence; intense seismic clusters; nonstationary signals; nonuniform scaling features; time-scaling behavior; ultra low frequency geomagnetic signals; Doped fiber amplifiers; Earthquakes; Fluctuations; Frequency; Geomagnetism; Magnetic analysis; Magnetometers; Performance analysis; Signal analysis; Signal processing; Detrended fluctuation analysis; earthquakes; geomagnetic data;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Communications, 2007. ICSPC 2007. IEEE International Conference on

Conference_Location

Dubai

Print_ISBN

978-1-4244-1235-8

Electronic_ISBN

978-1-4244-1236-5

Type

conf

DOI

10.1109/ICSPC.2007.4728362

Filename

4728362