Geodetically observed surface displacements of the 1999 Chi-Chi, Taiwan, Earthquake

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• 作者：Ming Yang ; Ruey-Juin Rau ; Jyh-Yih Yu ; Ting-To Yu
• 刊名：Earth, Planets and Space
• 出版年：2000
• 出版时间：June 2000
• 年：2000
• 卷：52
• 期：6
• 页码：403-413
• 全文大小：1313KB
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• 作者单位：Ming Yang (1)
  Ruey-Juin Rau (2)
  Jyh-Yih Yu (1)
  Ting-To Yu (2)
  
  1. Department of Surveying Engineering, National Cheng Kung University, Tainan, Taiwan
  2. Satellite Geoinformatics Research Center, National Cheng Kung University, Tainan, Taiwan
  
• 刊物类别：Earth Sciences, general; Geology; Geophysics/Geodesy;
• 刊物主题：Earth Sciences, general; Geology; Geophysics/Geodesy;
• 出版者：Springer Berlin Heidelberg
• ISSN：1880-5981

文摘

The 21 September 1999 Chi-Chi, Taiwan, earthquake of magnitude M_W = 7.6 (M_L = 7.3) severely deformed the Earth’s crust in the central Taiwan region. The earthquake created an 85-km-long surface rupture along the Chelungpu fault. The epicenter was located at 23.85°N, 120.81°E, near the southern end of the rupture zone. Three-dimensional displacements of 285 geodetic control stations were determined in this study from Global Positioning System (GPS) observations collected before and after the earthquake. The detailed surface displacement field shows that individual stations are vertically uplifted by up to 4 m and displaced horizontally by up to 9 m, with the largest displacement occurring near the northern end of the ruptured thrust fault. The azimuth of the surface displacement field is approximately parallel to the direction of tectonic convergence of the Eurasian and Philippine Sea plates. The maximum three-dimensional displacement of 9.9 m is among the largest fault movements ever measured for modern earthquakes.