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Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
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Volume 10, issue 2
Nat. Hazards Earth Syst. Sci., 10, 203–214, 2010
https://doi.org/10.5194/nhess-10-203-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Ground and satellite based observations during the time of...

Nat. Hazards Earth Syst. Sci., 10, 203–214, 2010
https://doi.org/10.5194/nhess-10-203-2010
© Author(s) 2010. This work is distributed under
the Creative Commons Attribution 3.0 License.

  09 Feb 2010

09 Feb 2010

The 6 April 2009 earthquake at L'Aquila: a preliminary analysis of magnetic field measurements

U. Villante1,2, M. De Lauretis1,2, C. De Paulis1,2, P. Francia1,2, A. Piancatelli1,2, E. Pietropaolo1,2, M. Vellante1,2, A. Meloni2,3, P. Palangio2,3, K. Schwingenschuh4, G. Prattes4, W. Magnes4, and P. Nenovski5 U. Villante et al.
  • 1Dipartimento di Fisica, Università L'Aquila, L'Aquila, Italy
  • 2Area di Ricerca in Astrogeofisica, L'Aquila, Italy
  • 3Istituto Nazionale di Geofisica e Vulcanologia, Roma, Italy
  • 4Institut für Weltraumforschung, Graz, Austria
  • 5Geophysical Institute, Sofia, Bulgaria

Abstract. Several investigations reported the possible identification of anomalous geomagnetic field signals prior to earthquake occurrence. In the ULF frequency range, candidates for precursory signatures have been proposed in the increase in the noise background and polarization parameter (i.e. the ratio between the amplitude/power of the vertical component and that one of the horizontal component), in the changing characteristics of the slope of the power spectrum and fractal dimension, in the possible occurrence of short duration pulses. We conducted, with conventional techniques of data processing, a preliminary analysis of the magnetic field observations performed at L'Aquila during three months preceding the 6 April 2009 earthquake, focusing attention on the possible occurrence of features similar to those identified in previous events. Within the limits of this analysis, we do not find compelling evidence for any of the features which have been proposed as earthquake precursors: indeed, most of aspects of our observations (which, in some cases, appear consistent with previous findings) might be interpreted in terms of the general magnetospheric conditions and/or of different sources.

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