Abstract
Scale invariant properties of seismicity argue for the presence of complex triggering mechanisms. We propose a new method, based on the space-time combined generalization of the correlation integral, that leads to a self-consistent visualization and analysis of both spatial and temporal correlations. The analysis has been applied on global medium-high seismicity. Results show that earthquakes do interact even on long distances and are correlated in time within defined spatial ranges varying over elapsed time. On that base we redefine the aftershock concept.
Highlights
Seismicity appears to be scale invariant in many of its aspects
We think that the complex phenomenon of seismicity calls for an approach capable of analysing spatial localisation
Cc(r, τ) is the generalisation of the correlation integral for a phenomenon that explicates in diverse dimensions with not comparable measurement units
Summary
Seismicity appears to be scale invariant in many of its aspects. Several papers (Kagan, 1994; Bak et al, 2002; Parson, 2002; Marsan and Bean, 2003; Corral, 2004) investigate spatial and temporal correlations of epicentres, involving for example the concepts of Omori law and fractal dimension. We think that the complex phenomenon of seismicity calls for an approach capable of analysing spatial localisation
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