Heterogeneity and anomalous critical indices in the aftershocks distribution of L Aquila earthquake

Details Heterogeneity and anomalous critical indices in the aftershocks distribution of L Aquila earthquake Heterogeneity and anomalous critical indices in the aftershocks distribution of L Aquila earthquake

2009-05-11

arxiv.org/abs/0905.1604v2

Physics

Geophysics

12 pages, 6 figures

Scientific paper

The data analysis of aftershock events of L Aquila earthquake in Apennines following the main 6.3 Mw event of April 6, 2009 has been carried out by standard statistical geophysical tools. The results show the heterogeneity of seismic activity in five different geographical sub-regions indicated by anomalous critical indices of power law distributions: the exponents of the Omori law, the b values of Gutenberg-Richter magnitude-frequency distribution, and the distribution of waiting times. The heterogeneous distribution of dynamic stress and a different morphology in the five sub-regions has been found and two anomalous sub-regions have been identified.

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