Abstract:We analyze the relationships between filter bandwidth, density of stations in the study area, threshold for correlation coefficient, and recognition rate. We also discuss the differences between “repeating events” by cross-correlation of seismic waveforms and the overlap of rupture zone semi-quantitatively. The results indicate that: more stations, local earthquake data, a 0.2-20 Hz bandpass filter and a detection threshold over 0.8 should be used. Furthermore, if MS≥4.5 for two repeating events, there is at least some overlap between their source zone.