Publication Date:
2017-04-04
Description:
Ida et al. (2005) document significant changes in the multi-fractal parameters of the ULF geomagnetic field H component starting about one month before the 1993 Guam
earthquake. According to the authors, these multi-fractal signatures can be considered as precursory signals of the Guam
earthquake. As a consequence, they conclude that the multifractal analysis may have an important role in the development
of short-term earthquake prediction capabilities. Since this and other similar reports have motivated the idea that
earthquake prediction based on electromagnetic precursory signals may one day become a routine technique, the presumed
precursors need to be validated through independent datasets. In this review the seismogenic origin of the multifractal
magnetic signatures documented by Ida et al. (2005) before the 8 August 1993 Guam earthquake is seriously put into question. By means of the geomagnetic ΣKp index, it is
demonstrated that these multi-fractal parameter changes are normal signals induced by the variation of the global geomagnetic
activity level.
Description:
Published
Description:
187-191
Description:
2.6. TTC - Laboratorio di gravimetria, magnetismo ed elettromagnetismo in aree attive
Description:
JCR Journal
Description:
open
Keywords:
Geomagnetic field
;
Magnetic anomalies
;
Earthquake precursors
;
Seismology
;
04. Solid Earth::04.05. Geomagnetism::04.05.04. Magnetic anomalies
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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