The scaling properties of the time dynamics of 2000-2001 ULF geomagnetic data (in the frequency range between 1 mHz and 10 Hz) observed at Izu Peninsula in Japan were investigated. On the basis of detrended fluctuation analysis (DFA), which is a powerful method to detect scaling in non-stationary time series, deviations from uniform power-law scaling were identified and quantified. Our results suggest that a significant non-uniform scaling behavior in ULF geomagnetic data could be related to the occurrence of intense seismic clusters. These first results could be useful in the framework of short-term earthquake prediction. (C) 2008 Elsevier B.V. All rights reserved.
Investigating non-uniform scaling behavior in Ultra Low Frequency (ULF) earthquake-related geomagnetic signals
Telesca L;Lapenna V;
2008
Abstract
The scaling properties of the time dynamics of 2000-2001 ULF geomagnetic data (in the frequency range between 1 mHz and 10 Hz) observed at Izu Peninsula in Japan were investigated. On the basis of detrended fluctuation analysis (DFA), which is a powerful method to detect scaling in non-stationary time series, deviations from uniform power-law scaling were identified and quantified. Our results suggest that a significant non-uniform scaling behavior in ULF geomagnetic data could be related to the occurrence of intense seismic clusters. These first results could be useful in the framework of short-term earthquake prediction. (C) 2008 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
