First Arrival Picking in Seismic Refraction Data by Cross-Corelation Technique

Abstract

The quantified interpretation of the seismic refraction record depends on correct and confident picking first arrival times. However, if the refraction data are poor, traditional first arrival picking techniques are not enough. For this reason, novel techniques are necessary to obtain first arrival times from such data. In this study the cross-correlation technique (CCT), commonly used in reflection data processing, was applied to determine first arrival times. By means of the technique, the process of the first arrival time picking is realized semi-automatically and erroneous picking to be arise from noises was decreased and picking procedure was attributed to mathematical base. Also, effectiveness of semi-automatic picking was especially evaluated with seismic refraction tomography.