;Taiwan is located in the boundary between the Philippine Sea and Eurasian plates. The Taiwan orogen is created by the collision between the continental shelf of the Eurasian plate and the oceanic crust of the Philippine sea plate. Currently, we have deployed 4 temporary seismic network in southeastern Central Range and combined with the earthquake data of the Central Weather Bureau of Taiwan (CWB) and Broadband Array in Taiwan for Seismology (BATS) to study the seismicity in this area. Totally, there were 581 earthquake with good quality of location from June to November, 2013 which are not recorded by CWB. Comparing the distribution of earthquakes during the same time from records of CWB, the pattern is similar. In the past study, there is an aseismic zone in our study area. However, we found some small magnitude earthquakes near DFN and DSK station in the southern of study area. Meaning the increase of station can help us to get small earthquake to complete the catalog of seismicity even though in aseismic zone. Besides, we also observed non-volcanic tremors (NVT). By using waveform envelope cross correlation method to locate 4 ambient tremors. The preliminary results is located at northern aseismic zone with the depth from 25 to 40 km. the source are more north of 0.5 degrees that compared with previous research in the southern Central Range. Furthermore, discussion with prior researchers, Wang et al. (2010) indicated that aseismic zone belongs to high attenuation zone and Hsieh et al. (2014) indicated that aseismic zone have high geothermal gradient. Concluded above, the rock strength weakening in the northern study area, while the southern part although sensitive to high temperatures but still have shallow micro-seismicity that may cause by an active thermal structure or shallow fluid-related activities.
