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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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Volume 11, issue 5/6
Nonlin. Processes Geophys., 11, 545–552, 2004
https://doi.org/10.5194/npg-11-545-2004
© Author(s) 2004. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

Special issue: Seismicity pattern dynamics

Nonlin. Processes Geophys., 11, 545–552, 2004
https://doi.org/10.5194/npg-11-545-2004
© Author(s) 2004. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  16 Nov 2004

16 Nov 2004

Investigating the spatial variability of the time-scaling properties in Italian seismicity

L. Telesca and V. Lapenna L. Telesca and V. Lapenna
  • Institute of Methodologies for Environmental Analysis, National Research Council, Tito Scalo (PZ), Italy

Abstract. Significant power-law long-range correlated structures have been identified in the Italian seismicity from 1983 to 2003. We performed the Allan Factor Analysis and the Detrended Fluctuation Analysis on both the full and the aftershock-depleted seismic data, extracted by the INGV (National Institute of Geophysics and Volcanology) instrumental catalog.Our findings suggest that (i) the time-scaling behaviour characterizes mainly the Apennine chain; (ii) the time-correlated behaviour of the seismicity is persistent, and this implies that the dynamics underlying the seismic phenomenology is characterized by the presence of "positive feedback mechanisms"; (iii) significant time correlation is not simply related with the mainshock/aftershock mechanisms.

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