Abstract:In this paper, we obtain waveforms from an MW5.7 deep-source earthquake with a depth of 554.9 km that occurred at the junction of Heilongjiang province and Jilin province (131.09°E, 43.32°N) on May 10, 2011. We analyze high-frequency (0.5 to 2 Hz) radial and vertical data from 22 NECESSArray stations, which are located in the Songliao basin. Using the effect layer on travel-time delays, and amplitudes of the P wave and Ps converted waves, we obtain the shear velocities on the top and bottom of the sediment layer using a grid-search method. The results show that the shear velocity on the top of the sediments below 22 stations is 0.1 to 1.0 km/s. The thickness of the basin is 0 to 6.5 km. Our results obtained in this paper generally agree with other studies, with some discrepancies at the edge, indicating that velocity structures of the sedimentary basin can be obtained through high-frequency Ps converted wave from local deep-source waveform data.
MA Haichao,CHU Risheng,SHENG Minhan et al. Sedimentary Structures of the Songliao Basin Using High-Frequency Ps Converted Wave from Local Deep Earthquakes[J]. jgg, 2020, 40(2): 214-220.