Seismic Imaging and Seismicity Analysis in Beijing-Tianjin-Tangshan Region

Figure 1

Geological setting and historical earthquakes in the BTT region. Colorful circles show the earthquakes with magnitudes (M) equal to or greater than 5.0 that occurred in the BTT region since 780 BC. Black squares denote major cities. Red star shows the capital of China. Thick curved lines show major active faults: (1) Tongxian-Nanyuan Fault; (2) Weixian-Yanqing Fault; (3) Laishui Fault; (4) Changli-Ninghe Fault; (5) Nankou-Sanhe Fault; (6) Xiadian-Fengheying-Caojiawu Fault; (7) Ninghe Fault; (8) Tangshan-Dacheng Fault; (9) Western Luanxian Fault.