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AGU: Journal of Geophysical Research, Solid Earth

 

Keywords

  • aftershocks
  • intertimes
  • interdistances

Index Terms

  • Nonlinear Geophysics: Scaling: spatial and temporal
  • Seismology: Earthquake interaction, forecasting, and prediction
  • Nonlinear Geophysics: Probability distributions, heavy and fat-tailed
Abstract
Cited By (3)
 

Abstract

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 114, B03303, 12 PP., 2009
doi:10.1029/2008JB005941

Identification and spatiotemporal organization of aftershocks

M. Bottiglieri

Department of Environmental Sciences, Interuniversity Consortium for the Physical Sciences of Matter, Second University of Naples, Caserta, Italy

E. Lippiello

Department of Environmental Sciences, Interuniversity Consortium for the Physical Sciences of Matter, Second University of Naples, Caserta, Italy

C. Godano

Department of Environmental Sciences, Interuniversity Consortium for the Physical Sciences of Matter, Second University of Naples, Caserta, Italy

L. de Arcangelis

Department of Information Engineering, Interuniversity Consortium for the Physical Sciences of Matter, Second University of Naples, Aversa, Italy

We propose a fast method able to discriminate between Poissonian independent earthquakes and aftershocks. The method is based on the evaluation of the variability coefficient, defined as the ratio between the standard deviation and the average value of the interoccurrence time between two successive earthquakes. We apply this technique to the California and a properly constructed synthetic catalogue in order to estimate the level of background seismicity and identify seismic sequences. We then investigate the spatiotemporal organization of aftershocks focusing on the distributions of interevent times and interevent distances between two successive events. We find evidence for the existence of a characteristic spatial length scale, related to the size of the aftershock zone, whereas no typical timescale is detected.

Received 21 July 2008; accepted 17 December 2008; published 12 March 2009.

Citation: Bottiglieri, M., E. Lippiello, C. Godano, and L. de Arcangelis (2009), Identification and spatiotemporal organization of aftershocks, J. Geophys. Res., 114, B03303, doi:10.1029/2008JB005941.

Cited By

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