粤闽赣交界区波速比特征研究

根据多台和达法,利用广东、福建、江西三省数字地震观测记录对粤闽赣交界区及邻区波速比特征进行研究,获取了具有参考价值的结果：粤闽赣交界地区沿海一侧明显比内陆地区波速比要高;约在北纬24°,东经114°处,处走向北东方向上是波速变化比较明显的分界线,该分界线可能是由于地下两侧的岩石岩性不同造成的,或与该地区介质物理性质和化学性质存在变异关有,也可能与此地区地震应力场变化有一定关系。

Research on Features of Wave Velocity Ratio at the Junction of Guangdong, Fujian and Jiangxi

This paper used the digital seismic observation records of Guangdong. Fujian and Jiangxi provinces, and studied the features of wave velocity ratio at this region and its adjacent area by the multi-station method. The valuable results are as following: the wave velocity ratio of coastal areas is significantly higher than that of inland areas in the study region; There is a NE direction boundary around 24°N, 114°E where the wave velocity has an obvious change, which may be caused by the differences of rock property on both sides underground, or the variability of physical and chemical properties of the medium in this region. The boundary may also relate to the seismic stress field variations in this region.