Abstract
ISOLA software package has been developed to invert local or regional full-wave seismograms for single- and multiple-point source models. The code was introduced in 2003; since then it has been continually upgraded, and, presently, it can be considered a well-established tool, used worldwide. Originally, the code name came from ‘isolated asperities’, to be resolved at fault planes of large earthquakes. However, with time, the code has been adapted for very diverse applications, ranging from Mw 0.3 to Mw 9. Many research papers based on usage of ISOLA have been published (see References). Almost every new application is challenging—hence the code is continually updated. The objective of this work is to explain the basic principles of the method, review code status, demonstrate a few examples to attract new users, and shortly touch also future development. The code is free, and can be downloaded together with manual and test examples from http://seismo.geology.upatras.gr/isola/ (last accessed March 2018).
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Acknowledgements
The authors sincerely thank to Ronnie Quintero, Lucas Barros, Patricia Pedraza and Didem Cambaz who organized ISOLA training courses. The courses provided important feedback to the authors. We also thank to users, worldwide, for huge number of e-mail questions that helped us to make the code more user friendly. ISOLA includes a modified version of the discrete-wave number code AXITRA of O. Coutant, filter XAPiir encoded by D. Harris, the NNLS inversion code of C.L. Lawson and R.J. Hanson, the MT-decomposition code by J. Šílený, several codes from Numerical recipes (Press 1992) and Matlab user file repository. Plots are created using GMT (Wessel and Smith 1998). For acknowledgment of data used as Example Greece, see Sokos et al. (2016). The Example Brazil is based on unpublished data provided by Lucas Barros and Juraci Carvalho, University of Brasilia. E.S. acknowledges financial support by HELPOS project, “Hellenic Plate Observing System” (MIS 5002697). J.Z. was supported by CzechGeo/EPOS (LM2015079) and the Czech Science Foundation (GACR-18-06716J).
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Zahradník, J., Sokos, E. (2018). ISOLA Code for Multiple-Point Source Modeling—Review. In: D'Amico, S. (eds) Moment Tensor Solutions. Springer Natural Hazards. Springer, Cham. https://doi.org/10.1007/978-3-319-77359-9_1
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