Modeling Earthquake Data Using 'ETAS' Model R package ETAS version 0.7.2 Fits the space-time Epidemic Type Aftershock Sequence ('ETAS') model to earthquake catalogs using a stochastic 'declustering' approach. The 'ETAS' model is a 'spatio-temporal' marked point process model and a special case of the 'Hawkes' process. The package is based on a Fortran program by 'Jiancang Zhuang' (available at <https://bemlar.ism.ac.jp/zhuang/software.html>), which is modified and translated into C++ and C such that it can be called from R. Parallel computing with 'OpenMP' is possible on supported platforms. Software Depends: R (>= 3.5.0), stats, graphics, utils, maps Imports: lattice, goftest, spatstat.geom, spatstat.explore, spatstat.random, Rcpp, fields LinkingTo: Rcpp (>= 1.0.0) Abdollah Jalilian <stat4aj@gmail.com> Comprehensive R Archive Network (CRAN) Abdollah Jalilian [aut, cre] (ORCID: <https://orcid.org/0000-0002-6573-0069>), Jiancang Zhuang [ctb] (ORCID: <https://orcid.org/0000-0002-9708-3871>) GPL (>= 2) 2025-10-24 application/tgz https://CRAN.R-project.org/package=ETAS doi:10.32614/CRAN.package.ETAS