Seismic Imaging and Seismicity Analysis in Beijing-Tianjin-Tangshan Region
Figure 7
Vertical cross-sections of P wave velocity perturbation at each longitude (115.5°E, 116.5°E, 117.5°E, and 118.5°E) (a) and each latitude (40.5°N, 39.8°N, and 39.0°N) (b). Red and blue colors denote slow and fast-velocity anomalies, respectively. The velocity perturbation scale (in %) is shown at the bottom. BJ: Beijing; TJ: Tianjin; TS: Tangshan; ZJK: Zhangjiakou; SJZ: Shijiazhuang.
