2015-01-012024-05-13https://scholars.lib.ntu.edu.tw/handle/123456789/642596摘要：集集地震後中央地質調查所投入大量的資源在活動斷層的觀測研究上，建立全島的移動式GPS測站、精密水準測線、連續GPS觀測網、井下應變儀觀測站和氣體與水氡地球化學與水位觀測站，蒐集和分析斷層的活動性和震前的應變異常。因此本計畫的執行，旨在結合GPS測量、水準測量，PS-InSAR、井下應變儀、地下水與地球化學觀測，結合地質構造、地震活動觀測、數值模擬和斷層活動度的研究，期能提供近斷層活動性及潛勢和可能地震前兆的資訊，並提供活動斷層地質敏感區分析之參考。今年計畫執行主要重點為：（1）分析地調所建置的80個連續GPS測站、交換的GPS測站及10站井下應變儀時間序列的應變異常；（2）由778台移動式GPS測站、42條精密水準測線和連續GPS觀測網，分析地殼變形之型態和活動構造的活動性，並利用數值摸式，反演斷層面上的鎖定率、滑移虧損和滑移率；(3) 利用C波段和L波段 持久性散射體合成孔徑雷達干涉技術（PS-InSAR）觀測評估臺灣地調所公布活動斷層活動性或潛在活動構造活動性，（4）比較井下應變儀和連續GPS觀測站的長期應變率，分析應變速率改變的因素；（5） 分析5座土壤氣體觀測站、2座水氡觀測站及6座水位站資料，觀測活動構造可能之前兆訊息與機制；（6）由地球化學觀測的異常事件資料，配合連續GPS觀測和井下應變儀，評估地震發生前的應變異常；（7）分析台灣西南部9條活動斷層的活動潛勢，取得斷層參數並製作台灣地區斷層活動機率潛勢圖。<br> Abstract: After 1999 Chi-Chi earthquake, the Central Geological Survey devotes a great deal of resource to establish an island-wide GPS network, precise leveling lines, continuous recording GPS network, local networks of borehole strainmeters, and gas composition and water-level monitoring stations in order to provide the basic data to assess the activity of major faults and strain anomaly related to the big earthquake. The goal of this proposal is to analyze and integrate the joint information about fault activity in Taiwan using the data from GPS, precise leveling, PS-InSAR, borehole strainmeter, gas composition and water-level monitoring stations which help to delineate the geological susceptibility area of active faults and information of possible earthquake precursory. The main missions of this year are to: (1) explore the anomalous crustal deformation phenomena by analyzing the time series from more than 80 continuous GPS and 10 borehole strainmeter stations; (2) determine the accumulation of current crustal strain pattern and fault activity by the data from 778 campaign GPS stations, 42 precise leveling lines and continuous GPS network to simulate the coupling coefficient, slip deficit and slip rate along the fault plane by inversion of geodetic measurements; (3) use C-band and L-band radar images with PS-InSAR technique to characterize the deformation pattern across the active faults in southwestern Taiwan; (4) compare the strain rate from continuous GPS and strainmeter measurements and assess the parameters for the change of strain rate; (5) analyze the data corrected from 5 gas composition monitoring stations, 2 groundwater-radon monitoring stations, and 6 groundwater-level monitoring stations to characterize the potential precursors and mechanisms; (6) study the anomalous strain rate change from the observation based on geochemical monitoring stations with the comparison of those from continuous GPS and borehole strainmeter measurement; (7) analyze the active potential of the 9 active faults in southwestern Taiwan, to assess fault parameters, and to set up active fault earthquake probability map.全球衛星定位系統連續觀測站PS-InSAR井下應變儀氣體地球化學水位觀測井斷層活動潛勢分析GPSCGPSPS-InSARBorehole StrainmeterGas geochemistryWater-level observation wellAalysis in Potential Activity of Faults