| dc.description.abstract | This study uses data obtained from Central Weather Bureau’s and National Central University’s temporary seismic stations between July, 2010 and January, 2011 to December, 2018, to detect the seismic activity in the southern Central Range. In this study, we use the three dimensional velocity model that proposed by Huang et al. (2014) as initial model to obtain the velocity structure in the research area with inversion. From P-wave velocity profiles, we find that the crust thickness between Eurasian Plate and Philippine Sea Plate are different. The boundary between these two plates is under the Longitudinal Valley. The P-wave velocity beneath the Coastal Range is faster than the Central range about 30 kilometers deep, and it shows that the geophysics properties between Eurasian Plate and Philippine Sea Plate are different. There is a low Vp/Vs ratio zone beneath the Longitudinal Valley, which may be caused by black schist. With the equation to convert velocity to density, we convert the inversion velocity structure to simulate the density structure. The trend in calculated Bouguer anomaly is not similar to the observed Bouguer anomaly. We find a gravity low in Central Range, it may be caused by the effect of low velocity zone 5~10 kilometers deep. | en_US |