Origin and Nonuniversality of the Earthquake Interevent Time Distribution

Sarah Touati, Mark Naylor, Ian Main

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Many authors have modeled regional earthquake interevent times using a gamma distribution, whereby data collapse occurs under a simple rescaling of the data from different regions or time periods. We show, using earthquake data and simulations, that the distribution is fundamentally a bimodal mixture distribution dominated by correlated aftershocks at short waiting times and independent events at longer times. The much-discussed power-law segment often arises as a crossover between these two. We explain the variation of the distribution with region size and show that it is not universal.
Original languageEnglish
Article number168501
Number of pages4
JournalPhysical Review Letters
Issue number16
Publication statusPublished - 24 Apr 2009


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