Abstract
The main purpose of this paper is to provide a tutorial application of SEDAv1.0, the first version of a software package, recently designed for the statistical analysis of earthquake data. SEDAv1.0 consists of a user-friendly Matlab-based interface, to facilitate the interaction with the application, and of a computational core of Fortran codes, to guarantee fast running times. The main part of SEDAv1.0 is devoted to the ETAS modeling. For the first time, an almost complete set of consistent tools based on ETAS models is collected in a single, free software. Moreover, SEDA guarantees the research reproducibility, which is becoming an increasingly major concern among scientists. The peculiarities of some routines of SEDAv1.0 are discussed in this paper, by the application to two important recent seismic sequences occurred in Italy. Specifically, the paper illustrates how using SEDAv1.0, to estimate the completeness magnitude and the b-value, to set and test the ETAS model and, finally, to identify the earthquakes sequences, basing on causal connections.
Highlights
This paper describes the use of the first version of SEDA (Statistical Earthquake Data Analysis, SEDAv1.0), a new software designed for the statistical analysis of earthquake data, by the application to two recent sequences occurred in Italy
The second group of tools, called ETAS Model, is designed for the analysis of an earthquake database by the ETAS (Epidemic Type Aftershock Sequence) modeling (Ogata, 1988; 1998). It is the core of SEDAv1.0 and contains original and partially innovative Fortran codes
The L’Aquila and the Emilia sequences are located in areas with different tectonic structure and have specific peculiarities
Summary
This paper describes the use of the first version of SEDA (Statistical Earthquake Data Analysis, SEDAv1.0), a new software designed for the statistical analysis of earthquake data, by the application to two recent sequences occurred in Italy. The first class, called Catalog Analysis, allows the descriptive analysis of an earthquake catalog, the selection of its subsets and the estimation of the magnitude distribution This set of tools includes original, but not innovative, codes and supports the user, in managing the database and in evaluating its homogeneity and magnitude completeness. The second group of tools, called ETAS Model, is designed for the analysis of an earthquake database by the ETAS (Epidemic Type Aftershock Sequence) modeling (Ogata, 1988; 1998). It is the core of SEDAv1.0 and contains original and partially innovative Fortran codes. The procedure for sequences identification is presented and discussed
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