Journal metrics

Journal metrics

  • IF value: 2.281 IF 2.281
  • IF 5-year value: 2.693 IF 5-year 2.693
  • CiteScore value: 2.43 CiteScore 2.43
  • SNIP value: 1.193 SNIP 1.193
  • SJR value: 0.965 SJR 0.965
  • IPP value: 2.31 IPP 2.31
  • h5-index value: 40 h5-index 40
  • Scimago H index value: 73 Scimago H index 73
Nat. Hazards Earth Syst. Sci., 13, 2189-2194, 2013
https://doi.org/10.5194/nhess-13-2189-2013
© Author(s) 2013. This work is distributed under
the Creative Commons Attribution 3.0 License.
Review article
06 Sep 2013
Review Article: On the relation between the seismic activity and the Hurst exponent of the geomagnetic field at the time of the 2000 Izu swarm
F. Masci1 and J. N. Thomas2,3,4 1Istituto Nazionale di Geofisica e Vulcanologia, L'Aquila, Italy
2Northwest Research Associates, Redmond, Washington, USA
3Department of Electrical and Computer Engineering, Digipen Institute of Technology, Redmond, Washington, USA
4Department of Earth and Space Sciences, University of Washington, Seattle, Washington, USA
Abstract. Many papers document the observation of earthquake-related precursory signatures in geomagnetic field data. However, the significance of these findings is ambiguous because the authors did not adequately take into account that these signals could have been generated by other sources, and the seismogenic origin of these signals have not been validated by comparison with independent datasets. Thus, they are not reliable examples of magnetic disturbances induced by the seismic activity. Hayakawa et al. (2004) claim that at the time of the 2000 Izu swarm the Hurst exponent of the Ultra-Low-Frequency (ULF: 0.001–10 Hz) band of the geomagnetic field varied in accord with the energy released by the seismicity. The present paper demonstrates that the behaviour of the Hurst exponent was insufficiently investigated and also misinterpreted by the authors. We clearly show that during the Izu swarm the changes of the Hurst exponent were strongly related to the level of global geomagnetic activity and not to the increase of the local seismic activity.

Citation: Masci, F. and Thomas, J. N.: Review Article: On the relation between the seismic activity and the Hurst exponent of the geomagnetic field at the time of the 2000 Izu swarm, Nat. Hazards Earth Syst. Sci., 13, 2189-2194, https://doi.org/10.5194/nhess-13-2189-2013, 2013.
Publications Copernicus
Download
Share