Figures of the Article

• Geological structures of the Shanxi rift zone and surrounding areas
• Distribution of seismic stations in the Shanxi rift zone and surrounding areas
• The noise cross-correlation functions between station ANZ (as indicated by the white triangle in Fig.2) and all other stations in the 5~40 s period range. Consistent Rayleigh wave signals can be clearly observed in both positive and negative delays
• Phase velocity dispersion curves for the 5~40 s period range used in the final inversion after quality control. The yellow solid line represents the average phase velocity in each period
• Number of ray paths for different periods in the 5~40 s range
• Ray-path coverage for different periods
• (a) Velocity model after inversion， (b) Sensitivity kernel test
• (a) Comparison of the initial S-wave model (red line) and final model (blue line). (b) Comparison of the average observed Rayleigh wave phase velocity dispersion curves (black solid line), dispersion curve fitted by the initial model (red dashed line), and dispersion curve fitted by the final model (blue dashed line) for different periods
• Results of a checkerboard resolution test for velocity anomalies on a 2° × 2° horizontal scale
• Results of a checkerboard resolution test for velocity anomalies on a 1.5°× 1.5° horizontal scale
• Results of a checkerboard resolution test for velocity anomalies on a 1 °× 1 °horizontal scale
• (a) Variation in surface wave root-mean-square (RMS) travel time residuals with number of inversion iterations. (b) Dispersion curves before (dashed line) and after (solid line) inversion
• Images of S-wave velocities at different depths
• Vertical S-wave velocity profiles
• Synthetic test results