Seismic Imaging and Seismicity Analysis in Beijing-Tianjin-Tangshan Region
Figure 9
(a) and (b) show the map view of P wave velocity perturbations (in %) and distribution of relocated earthquake hypocenters at 10 km and 15 km, respectively. The white circles denote small earthquakes within 5 km off the different layer depth. The white stars show historic earthquake hypocenters (M ≥ 6.0). Red and blue colors denote slow- and fast-velocity anomalies, respectively. The velocity perturbation scale (in %) is shown at the bottom.
