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Seismic Toolkit is a tool for processing and displaying seismic signal data in a graphical interface. It reads seismic signals in SAC format, and provides a variety of signal processing, such as filtering, spectral analysis, polarisation analysis, time-frequency representation, Hilbert transform, and singular value decomposition. Some utilities are included for useful seismological applications, like computation of Seismic Moment Mo, Mantle magnitude Mm and Moment magnitude Mw, MTPA spectral analysis, plotting focal mechanisms, computation (and plotting) of instrumental response from poles and zeros, and some usefull GMT (Generic Mapping Tool) scripts for plotting signals, responses, and time-frequency in Postscript files for high quality prints.License: GNU General Public License (GPL)Changes:
Reading of files was secured to avoid a crash when reading files in the wrong format. A new version of MM_MAG is used, which takes into account signal/noise ratio to avoid over-estimation of magnitudes for a small S/N ratio. The validity of Mm is checked with the criterion of a minimum signal/noise ratio. The minimum valid signal/noise ratio is defined in the configuration file MM_mag_x_xx.ini.



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