Small world picture of worldwide seismic events

Douglas S.R. Ferreira, Andrés R.R. Papa and Ronaldo Menezes

Physica A: Statistical Mechanics and its Applications, 2014, vol. 408, issue C, 170-180

Abstract: The understanding of long-distance relations between seismic activities has for long been of interest to seismologists and geologists. In this paper we have used data from the worldwide earthquake catalog for the period between 1972 and 2011 to generate a network of sites around the world for earthquakes with magnitude m≥4.5 in the Richter scale. After the network construction, we have analyzed the results under two viewpoints. First, in contrast to previous works, which have considered just small areas, we showed that the best fitting for networks of seismic events is not a pure power law, but a power law with exponential cutoff; we also have found that the global network presents small-world properties. Second, we have found that the time intervals between successive earthquakes have a cumulative probability distribution well fitted by nontraditional functional forms. The implications of our results are significant because they seem to indicate that seisms around the world are not independent. In this paper we provide evidence to support this argument.

Keywords: Small-world networks; Seismic networks; Q-exponential distributions (search for similar items in EconPapers)
Date: 2014
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Citations: View citations in EconPapers (4)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:408:y:2014:i:c:p:170-180

DOI: 10.1016/j.physa.2014.04.024

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