HR: 0800h
AN: T11D-1313    [Abstracts]
TI: New GPS Network on the Active Fault System in Taiwan
AU: * Hou, C
EM: hcs@moeacgs.gov.tw
AF: Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C., No.2, Lane 109, Hua-Hsin Street, Chung-Ho, Taipei, 235 Taiwan
AU: * Hou, C
EM: hcs@moeacgs.gov.tw
AF: Institute of Geosciences, NTU, Taipei, Taiwan, R.O.C., No.1, Sec. 4, Roosevelt Road, Taipei, 106 Taiwan
AU: Chen, Y
AF: Institute of Geosciences, NTU, Taipei, Taiwan, R.O.C., No.1, Sec. 4, Roosevelt Road, Taipei, 106 Taiwan
AU: Hu, J
AF: Institute of Geosciences, NTU, Taipei, Taiwan, R.O.C., No.1, Sec. 4, Roosevelt Road, Taipei, 106 Taiwan
AU: Lin, C
EM: lincw@moeacgs.gov.tw
AF: Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C., No.2, Lane 109, Hua-Hsin Street, Chung-Ho, Taipei, 235 Taiwan
AU: Chen, C
EM: surveydo@moeacgs.gov.tw
AF: Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C., No.2, Lane 109, Hua-Hsin Street, Chung-Ho, Taipei, 235 Taiwan
AU: Wang, J
AF: Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C., No.2, Lane 109, Hua-Hsin Street, Chung-Ho, Taipei, 235 Taiwan
AU: Chung, L
EM: peace@moeacgs.gov.tw
AF: Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C., No.2, Lane 109, Hua-Hsin Street, Chung-Ho, Taipei, 235 Taiwan
AU: Chung, W
AF: Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C., No.2, Lane 109, Hua-Hsin Street, Chung-Ho, Taipei, 235 Taiwan
AU: Hsieh, C
AF: Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C., No.2, Lane 109, Hua-Hsin Street, Chung-Ho, Taipei, 235 Taiwan
AU: Chen, Y
AF: Central Geological Survey, MOEA, Taipei, Taiwan, R.O.C., No.2, Lane 109, Hua-Hsin Street, Chung-Ho, Taipei, 235 Taiwan
AB: According to the historical records, disastrous earthquakes occurred in Taiwan were caused by reactivations of active faults. In last century, there were five with the surface rupture: 1906 Meishan Eq. (the Meishan F.), 1935 Hsihchu Eq. (the Shihtan and the Tuntzuchiao F.), 1946 Hsinhua Eq. (Hsinhua F.), 1951 Hualien-Taitung Eq. (Longitudinal Valley F.), and 1999 Chi-Chi Eq. (the Chelungpu F.). In order to identify earthquake associated surface rupture and further to mitigate potential hazards, the investigation and monitoring on the active fault system are of great urgency. Central Geological Survey (CGS) of Taiwan is currently executing a 5-year (2002-2006) project, integrating geological and geodetic data to better characterize short-term and long-term spatial and temporal variations in deformation across major already-known active faults of Taiwan. For the former, we use field survey, drilling, geophysical exploration, and trenching to recognize the long-term slip rate and recurrence interval of each fault. For the latter, we deploy near-fault campaign-style GPS and leveling monitoring networks. Here we further combine the result of other GPS networks including continuous-mode. This project is actually concentrated on fault-specific investigation.. Until Dec. 2004, we have set up 756 GPS stations and 27 precise leveling lines including 1024 leveling benchmarks. For the purpose of understanding temporal variability and receive continuous record, the CGS began to deploy 6~10 new GPS stations of continuous mode since 2004. Upon the completion of the geodetic project, we are supposed to provide information on short-term slip rates of major active faults. By integrating other geological datasets we will also evaluate the short-term and long-term behavior of the active faults, and further offer insight into spatial and temporal variability in deformation processes.
DE: 7223 Seismic hazard assessment and prediction
DE: 8107 Continental neotectonics
DE: 1709 Geodesy
DE: 1744 Tectonophysics
SC: Tectonophysics [T]
MN: 2004 AGU Fall Meeting