Acta Geophysica vol. 57, no. 2, pp. 330-345 DOI: 10.2478/s11600-008-0071-5 ________________________________________________ © 2009 Institute of Geophysics, Polish Academy of Sciences Refining Locations of the 2005 Mukacheve, West Ukraine, Earthquakes Based on Similarity of their Waveforms Andriy GNYP Carpathian Branch of Subbotin Institute of Geophysics, National Academy of Sciences of Ukraine, Lviv, Ukraine e-mail: gnyp@cb-igph.lviv.ua Abstract Based on the results of application of correlation analysis to records of the 2005 Mukacheve group of recurrent events and their subsequent relocation relative to the reference event of 7 July 2005, a conclusion has been drawn that all the events had most likely occurred on the same rup- ture plane. Station terms have been estimated for seismic stations of the Transcarpathians, accounting for variation of seismic velocities beneath their locations as compared to the travel time tables used in the study. In methodical aspect, potentials and usefulness of correlation analysis of seismic records for a more detailed study of seismic processes, tectonics and geodynamics of the Carpathian region have been demonstrated. Key words: recurring earthquakes, waveforms, cross-correlation, reloca- tion, station terms. 1. INTRODUCTION The fact that records of some seismic events appear very similar to each other at the same station had been known almost since the beginning of instrumen- tal observations. Explanation to the phenomenon was very simple – factors shaping the records, source and path effects must be the same, similar, or even identical in these events. It was not until digital records became availa- ble en masse, along with adequate computing and storing facilities, however,