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Focal mechanisms of natural and induced seismicity in the Carpathian region of Ukraine
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, First EAGE Workshop on Assessment of Landslide and Debris Flows Hazards in the Carpathians, Jun 2019, Volume 2019, p.1 - 5
Abstract
Understanding source mechanisms of induced earthquakes is important to distinguish them from natural ones. The authors of the paper have 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 propose 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.