ABSTRACT
In order to figure out the relationships between historical earthquakes and the associated faults, their seumological data arc restudied. A Monte Carlo algorithm is used to reconstruct earthquake source parameters based on P-S times for instrumental historical event where the timing systems of seismic stations available were not in that time. Comparing the isoseismal map and the trajectory of surface faulting with relocated epicenters, it can be found that results of this study may be more reasoning than the previous studies. The following points are noted: 1. four of the ruptures occurred in the coastal plain and foothills of western Taiwan and four occurred in the Longitudinal Valley of eastern Taiwan; 2. there are several features suggest that the Chihshang fault and the Chimei fault were activated during the movement of the earthquakes but has not been reported before; 3. the Shinchoshan fault and the Juisui fault which associated with 1935 and 1972 earthquakes were no sign of surface faulting, they are reinterpreted just landslide induced by earthquakes. According to the stress analysis of those earthquake-faults, the steadiness of NW-SE principal stress of compression is witnessed.
