Fig. 1

Epicenters (black stars) and focal mechanisms for the eight moderate-sized events that struck the Nantou area in 1999 and 2013, as listed in Table 1. The gray stars show the epicenters of the 1916 Nantou earthquake sequence. The active faults (thick lines) identified by Central Geological Survey of Taiwan are also shown. CHF Changhua fault, CLPF Chelungpu fault, STF Shuangtung fault, LVF Longitudinal Valley fault