Focal mechanisms of natural and induced seismicity in the Carpathian region of Ukraine
D. Malytskyy, O. Hrytsai, A. Gnyp, E. Kozlovskyy, S. Kravets
Event name: First EAGE Workshop on Assessment of Landslide and Debris Flows Hazards in the Carpathians
Session: Assessment of geological hazards and new techniques for risk mitigation
Publication date: 18 June 2019
Info: Extended abstract, PDF ( 573.92Kb )
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Understanding source mechanisms of induced earthquakes is important to distinguish them from natural ones. The authors of the paper has developed a method for determination of seismic moment tensor using data from a small number of seismic stations. The use of only direct P-waves for the inversion reduces its sensitivity to inaccurate knowledge of medium model between the source and the stations and improves the reliability of the resulting tensor and, in such a way, our ability to distinguish between the natural and induced earthquakes. The authors also proposes a method for determination of extended source parameters (finite-fault solution) by inversion of wave field also from only direct P-waves registered by a small number of seismic stations. It enables to determine the distribution of slips along the fault, providing a valuable resource for investigation and better understanding of source processes, ultimately guiding to improved seismic-hazard analysis in the areas of induced earthquakes.