Extracting the Group Velocity of Rayleigh Waves from the Cross Correlation of the Ambient Seismic Noise Between Two Seismic Stations

查看全文 作　　者：Jin [1,2,3]Xing;Li [2]Jun;Lin [1]Shu;Zhou [1]Zhengrong;Kang [3]Lanchi;Ou [3]Yiping 机构地区：[1]Earthquake Administration of Fujian Province, Fuzhou 350003, China;[2]Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China;[3]Fuzhou University, Fuzhou 350002, China 出　　处：《Earthquake Research in China》索引2008年第22卷第3期,共11页 基　　金：the Special Financing Projects of China Earthquake Administration and the Joint Earthquake Science Foundation of China (C08037) 摘　　要：This paper uses the 8 broad-band stations' microseism data recorded by the Seismic Monitoring Network of Fujian Province to calculate the vertical correlation coefficient between two stations at intervals of 5 minutes. According to the time intervals technique we obtain the different coefficients and then add the correlative coefficients. Depending on this, we extract the group velocity of Rayleigh waves from the cross correlation of the ambient seismic noise between two seismic stations and figure out the group velocity' spatial distribution. The results show that the signal noise ratio (SNR) increases proportionally to the superposition times, but the results from different days are similar to one another. Synchronously, the arrival-time is also stable and there is no obvious change when coming across typhoons. It is found the velocity of the surface wave is 2.9~3.1km/s in Fujian Province, which is close to the observationally attained value. 关 键 词：地震 相关性 震感 研究