The Weibull - Log Weibull Distribution for Interoccurrence Times of Earthquakes

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dc.creatorHasumi, Tomohiro
dc.creatorAkimoto, Takuma
dc.creatorAizawa, Yoji
dc.date2008-07-03
dc.date2008-12-12
dc.date.accessioned2026-07-07T12:11:49Z
dc.date.available2026-07-07T12:11:49Z
dc.descriptionBy analyzing the Japan Meteorological Agency (JMA) seismic catalog for different tectonic settings, we have found that the probability distributions of time intervals between successive earthquakes --interoccurrence times-- can be described by the superposition of the Weibull distribution and the log-Weibull distribution. In particular, the distribution of large earthquakes obeys the Weibull distribution with the exponent $α_1 <1$, indicating the fact that the sequence of large earthquakes is not a Poisson process. It is found that the ratio of the Weibull distribution to the probability distribution of the interoccurrence time gradually increases with increase in the threshold of magnitude. Our results infer that Weibull statistics and log-Weibull statistics coexist in the interoccurrence time statistics, and that the change of the distribution is considered as the change of the dominant distribution. In this case, the dominant distribution changes from the log-Weibull distribution to the Weibull distribution, allowing us to reinforce the view that the interoccurrence time exhibits the transition from the Weibull regime to the log-Weibull regime.
dc.description11 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0807.0485
dc.identifierhttp://arxiv.org/abs/0807.0485
dc.identifierPhysica A, 388, 491-498, (2009)
dc.identifierdoi:10.1016/j.physa.2008.10.023
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/210343
dc.subjectGeophysics
dc.subjectData Analysis, Statistics and Probability
dc.titleThe Weibull - Log Weibull Distribution for Interoccurrence Times of Earthquakes
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