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arXiv 2301.02586physics.geo-ph
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纯时间流行型余震序列(ETAS)地震模拟过程的分形研究

A fractional approach to study the pure-temporal Epidemic Type Aftershock Sequence (ETAS) process for earthquakes modeling

Lorenzo Cristofaro, Roberto Garra, Enrico Scalas, Ilaria Spassiani

摘要:

在统计地震学中,流行型余震序列(ETAS)模型是一个分支过程,在世界范围内用于预测地震烈度率,并再现在地震活动目录中观察到的许多统计特征。在本文中,我们描述了一个分数阶微分方程,控制地震烈度率的纯时间ETAS模型使用Caputo分数阶导数,我们解决了它的解析。我们强调,分数阶微积分的工具和特殊功能简化了经典的方法来获得强度率,让我们描述的变化的解决方案衰减大的时间。我们还将理论结果应用于1965-2003年的日本星表,并进行了讨论。

英文摘要:

In statistical seismology, the Epidemic Type Aftershocks Sequence (ETAS) model is a branching process used world-wide to forecast earthquake intensity rates and reproduce many statistical features observed in seismicity catalogs. In this paper, we describe a fractional differential equation that governs the earthquake intensity rate of the pure temporal ETAS model by using the Caputo fractional derivative and we solve it analytically. We highlight that the tools and special functions of fractional calculus simplify the classical methods employed to obtain the intensity rate and let us describe the change of solution decay for large times. We also apply and discuss the theoretical results to the Japanese catalog in the period 1965-2003.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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