Development of a local travel-time curve based on data from a local seismic observation network

The use of a local travel-time curve adapted to the geological and seismic conditions of a particular region is of great importance for the high-precision determination of the coordinates and depths of seismic events. In this study, a local travel-time curve was developed based on data from a local seismic observation network established within the Aydar-Arnasay depression. The arrival times of P and S waves from earthquakes recorded over several years of observations were analyzed, and a local travel-time curve was constructed for epicentral distances of 0-40 km. Based on the obtained results, the layered velocity model of the study area was refined. The application of the local travel-time curve improved the accuracy of epicentral and hypocentral parameters determination, enabled more reliable discrimination between induced and natural seismic events, and enhanced the quality of subsequent seismic monitoring.

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