The seismic Moment Tensor is a standard description of earthquake kinematic source processes over a whole range of magnitudes. Seismic moment tensor inversion allows to estimate the fault plane parameters and the relation between volumetric and non- volumetric strain in the seismic source (Knopoff and Randall, 1970). The resolved moment tensors are typically decomposed into volumetric and deviatoric components using various decomposition schemes allowing to understand the detailed physical kinematic source processes regardless of the type of seismicity and event magnitude. The analysis of seismic moment tensors allows to shed light on numerous issues of earthquake physics such as rupture dynamics, fault complexity, the role of pore pressure in seismogenic processes and damage-related radiation of seismic energy. hybridMT is a software package for seismic moment tensor inversion and its posterior refinement designed for MATLAB® and shell environments. The shell application focimt and its MATLAB® wrapper focimt.m provide means to perform different types of moment tensor inversions, capture the inversion results and generate the graphical output within or outside MATLAB® environment. The moment tensor inversion results may be optionally improved using provided MATLAB® implementation of the Hybrid Moment Tensor technique. The technique includes the refinement of seismic moment tensors of events forming a cluster by suppressing the influence of poorly known source-receiver paths and site-effects. The software package was tested using synthetic dataset, acoustic emission data from laboratory experiments as well as induced seismicity data from geothermal sites.

Authors

Referencing

When you find hybridMT package useful, please refer to it in your work: Kwiatek, G., P. Martínez-Garzón, and M. Bohnhoff (2016), HybridMT: A MATLAB/shell environment package for seismic moment tensor inversion and refinement, Seismol. Res. Lett., doi:10.1785/0220150251

Download and documentation

To download the software package, please use the external website: http://induced.pl/hybridmt (The GFZ is not responsible for the content of the external website). After filling the required data, an email will be sent to you with the download link. Please check your mailbox. If you don't receive an email from us, please contact us directly. The hybridMT package documentation is provided in the package. For your convenience, you can download the documentation directly from here. The application of software package is presented in Kwiatek et al. (2016).

License

hybridMT package is licensed under GNU General Public License (GPL)

References

Knopoff, L., and M. J. Randall (1970). The compensated linear-vector dipole. A possible mechanism for deep earthquakes, J. Geophys. Res. 75, 1957–1963.

Kwiatek, G., P. Martínez-Garzón, and M. Bohnhoff (2016), HybridMT: A MATLAB/shell environment package for seismic moment tensor inversion and refinement, Seismol. Res. Lett., doi:10.1785/0220150251

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