Process in precise measurement of seismic velocity variation by correlated detection
利用相关检测进行地震波速变化精确测量研究进展

To monitor interior stress's variation which is variety by time is an effective approach of seismic physical forecast.This paper reviewed the results concerning the precise measurement of seismic velocity variation and application, discussed the principle and application of the correlated detection.Making use of active seismic source,recording seismic signal by survey disposal,and combining the seismology with communication science,using correlated detection can get rid of disturb and uncertainty factor.The approach can resolve the problem about precise measurement of seismic velocity,and offer method for seismic physical forecast.Our group carried out a field experiment to attain seismic signal by active source,and we received seismic wave by instruments on the same ray.This field experiment lasted on 30 days to detect the velocity variation of p wave,the precision of the velocity variation achieved to 1.00E-05.