A new geomechanical modeling technique is presented in which the models can generate seis-micity from induced cracks and fractures. Seismic source locations, magnitudes and mechanisms can be calculated presenting a unique possibility for model validation. The seismicity produced by the models can be compared directly with seismic source information recorded in field studies to assess whether or not the models are behaving in a realistic manner and could therefore be used in future analytical or predictive studies. Two example applications are presented: an underground excavation in granite, and a waste re-injection (hy-drofracture) simulation in mudstone. Semi-quantitative comparisons are made between seismicity produced by the models and the actual seismicity recorded in the corresponding field studies. Although some discrepancies exist, the agreement between the modeled and the actual seismic source information is generally good, giving confidence that this technique could be used in further geomechanical investigations.
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