本研究利用先進的地面三維雷射掃瞄技術，對實驗區域台東池上斷層-大坡國小地區，於2003年12月10日Mw 6.5台東成功地震前後進行四次的掃瞄（2003年8月至2004年5月間），藉以建立斷層帶的地表模型，並研究使用該項技術應用於斷層變形監測的成效，並分析2003年Mw 6.5台東成功地震同震、震後的位移情形；另於第四次掃瞄中配合使用衛星定位測量技術，將掃瞄所得點雲資料與地面坐標系結合，嘗試作為大區域近斷層帶變形監測的方法。

　　依照地面三維雷射掃瞄所得的成果，使用這項技術應用於斷層變形監測，其觀測精度約為9 mm，對於地殼變動快速（~2 cm/yr）的斷層帶地區實為一項可行性的方法；而在地震同震及震後位移上，台東成功地震對池上斷層-台東大坡國小地區上盤所產生的同震位移水平方向約由東南朝西北方向位移2.8~6.8 cm，高程抬昇3 cm。在震後位移方面，震後2個月內，水平方向上盤同樣由東南朝西北方向位移約3 cm，高程抬昇1.5 cm；至震後2~5個月間，則僅水平方向位移約2 cm。此研究成果顯示：台東成功地震在池上斷層呈現顯著之震後無震潛移。

　　The primary goal of this study is to test the feasibility of using 3-D ground-based laser scanner to build the crustal deformation model near fault zones. Main results of four scanning tests were carried out at the Da-Po elementary school on the Chishang fault, eastern Taiwan, from August 2003 to May 2004. This study further combines the new technology method to evaluate the fault deformation monitoring, and to analyze the displacement of co-seismic and post-seismic of the 2003 Mw6.5 Taitung Chengkung earthquake. In addition, with the use of GPS in the fourth scanning, this study tempts to combine the earth coordinate system with point cloud data obtained from the scanning as a trial method in monitoring the deformation of the fault zone.

　　Results from the 3-D ground-based laser scan tests indicate three findings: first, it is a feasible technology method to detect the fault deformation with accuracy of ~9 mm. Second, for the hanging-wall displacement of co-seismic and post-seismic for the Taitung Chengkung earthquake, the horizontal direction displacement moving from southeast towards northwest is about 2.8~6.8 cm, while the vertical displacement is 3 cm. Third, regarding to the post-seismic displacement, the horizontal direction displacement moving from southeast towards northwest is about 3 cm with vertical displacement of 1.5 cm after 2 month, and horizontal displacement goes farther by 2 cm after the earthquake between 2-5 months. This study concludes that clear post-seismic creep is evidenced from the 2003 Taitung Chengkung earthquake on the Chishang fault.

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