Large Event Analysis
Large Event Analysis details
- analysis of uncertainty of the source location accounting for errors in the picking and velocity model. Association of the source with geological features or elements of the mining system;
- consideration of time history of seismic parameters in the source area (Cumulative Apparent Volume, Energy Index, Seismic Schmidt Number, etc.) and correlation of historical co-seismic deformation with production;
- study of the mechanism:
- inversion of the moment tensor;
- testing of possible sources (slip on a structure, pillar failure) against the recorded waveforms;
- comparison of seismic data with the results of numerical modelling (ESS on structures, synthetic mechanism).
Carrying out of underground observations in the case of observable damage is imperative. The relation between the source mechanism and mechanism of the damage is deduced. Modelling of strong ground motion could be useful both for interpretation of pattern of damage and constraining the dynamic characteristics of the source process.