Gamma Ray and Radon Anomalies in Northern Taiwan as a Possible Preearthquake Indicator around the Plate Boundary

Figure 6

The seismic velocity structure transecting northern Taiwan along the a-a line of Figure 1 is derived based on the local earthquake tomography model by Wu et al. [53]. The dots show the relocated events for within ±5 km of the profile. The red open circle means that the projected earthquake with a preanomalous signal is listed in Table 2. Note that the hypocenters get deeper towards the north. The yellow dashed line indicates the subduction boundary between the PSP and the EP.