甘肃祁连山大容量气枪主动源最大探测范围

摘要

叠加甘肃和青海数字测震台网记录到的甘肃祁连山大容量气枪连续激发的大量观测波形.结果显示,单次激发的气枪震源信号最远可以在距气枪震源304 km的古浪台(GLT)识别,通过110次叠加的信号最远可以追踪到412 km的安西台(AXX),4600次叠加的信号最远可以在距气枪震源677 km的乌图美仁台站(WTM)观测到.研究结果可为提高甘肃祁连山大容量气枪主动源观测系统的监测能力和微弱信号的提取能力,探讨祁连山区域内部介质速度变化等工作提供重要的科学意义.%Numerous waveform data,which continuously vary owing to excitation by the large-volume, airgun active source in Qilian Mountains,Gansu Province and are recorded by the Gansu and Qinghai digital seismic network,are stacked in this study.The results reveal that after single excitation,the air-gun source signals could be detected by the GLT station located 304 km away from the source;the sig-nals stacked 110 times could be detected by the AXX station located 412 km away from the source;and the signals stacked 4,600 times could be detected by the WTM station located 677 km away from the source.The findings of this study are of great scientific importance for improving the monitoring capabili-ty of the large-volume,airgun active source observation system in Qilian Mountains,extracting weak signals,and discussing the velocity change of internal medium in Qilian Mountains.