新竹科學園區活動斷層地震地質學研究

This study applied different methods of earthquake geology to work on the
active-fault systems located in and surrounding the Scientific Industrial Park of Hsinchu. The objectives of this project are to understand the spatial distribution of
the active-fault systems, to dig out their paleo-earthquake records, and to figure out
their recent activity. We hope to provide essential information in land-use of Industrial Park.
Five jobs have been conducted: (1) Morphotectonic analysis; (2)
Paleoseismology study on Hsincheng fault; (3) Shallow seismic study on Hsincheng
fault; (4) Spatial analysis on the hypocenters of the background seismicities; (5)
Preliminary study on geodetic survey. We used the DEM, aerial photos, satellite
imagery, and field survey to remap the geomorphic surfaces and tectonic scarps.
The results show both of Hsinchu and Hsincheng fault have recent activities.
Paleoseismology study gives a cumulative vertical-slip of least 18m. Shallow
seismic survey works out the surface trace in the Tuhsin military base. Hypocenter
distribution further suggest that above-mentioned two active fault are both aseismic
over the past ten years, indicating the faults are probably coseismic-reactivated. The
purpose of geodectic study is to monitor the very recent behaviors of the active faults.
The final result will come up in two years till the end of 2004.