Comparative Study on Two Methods for Measuring Wave Velocity Change of Crustal Medium Based on Large Volume Airgun Excitation Data

作者：YE Beng,CAO Wenzhong,HUO Yuanhang,CHEN Jia,LI Xiaobin

摘要：This paper proposes the application of dynamic programming method to calculate the relative change of wave velocities and compares its similarities and differences with the cross-correlation delay estimation method based on interference.The results show that:①the trend of wave velocities obtained by cross-correlation method and dynamic programming method are consistent.Besides,it is considered that the calculated result using cross-correlation delay method is reliable.②Compared with the cross-correlation delay method,the calculated result of the dynamic programming method has a magnifying effect and is more sensitive to small disturbances.③Under ideal conditions,the wave velocity change trend calculated by P-wave and S-wave phase should be consistent.In addition,the cross-correlation delay method is used to calculate the wave velocity change.Under appropriate conditions,the process of recovering from the suspected wave velocity before the M_L1.1 earthquake near the airgun source can be observed.

發文機構：Office of the Western Yunnan Earthquake Prediction Study Area University of Science and Technology of China

關鍵詞：ArtificialSOURCEAirgunSOURCECROSS-CORRELATIONWavevelocityCHANGEDynamicPROGRAMMING

分類號： P31[天文地球—固體地球物理學][天文地球—地球物理學]