Abstract：The basic idea for picking up first break by energy ratio method is described as below:the seismic amplitude is very small before the first break,while it is increased to a big value after the first break,therefore the energy ratio between two time windows near the first break will be a very big value which should correspond to the first break time of the seismic trace.In this paper under Linux working environment and utilizing QT as developing platform,application of the energy ratio method realized the access to SEG-Y format seismic files,the first break times were automatically and interactively picked up,checked and correlated in common shot point gathers,common receiver point gathers and common offset gathers respectively,the efficiency and accuracy for seismic first break picking up were raised greatly.
