User Guide: Mechanism: Full Moment Tensor

The program performs inversion of amplitudes of longitudinal (P) and transversal (S) seismic waves as 3-component vectors into the mechanism of the seismic source in the description of unconstrained moment tensor (MT). As such, it allows describe general dipole sources including isotropic components: e.g., it is suitable to retrieve the parameters of both a shear dislocation common at foci of tectonic earthquakes (described as a double-couple, DC) and volumetric sources as tensile cracks or cavity implosions. It provides the MT error estimate: evaluates the data covariance matrix based on standard deviations of individual components of P and S motion.

The application is designed preferentially for processing of seismic events induced by industrial activity (mining, hydro-fracture test in geothermal and oil wells etc.).