Coseismic displacement and tectonic implication of 1951 Longitudinal Valley earthquake sequence, eastern Taiwan

Yuan Hsi Lee, Guin Ting Chen, Ruey Juin Rau, Kuo En Ching

研究成果: Article同行評審

12 引文 斯高帕斯(Scopus)

摘要

The Longitudinal Valley Fault (LVF) in eastern Taiwan is an extremely active fault with 3-4 cm of displacements consumed each year along its length. The fault forms the suture zone between the Philippine Sea and Eurasian plates as a result of an oblique arc continental collision. From 22 October to 5 December 1951, four earthquakes (Ms > 7) shook the LVF. We used triangulation (from 1917 to 1921 to 1976-1978) and interseismic GPS (from 1990 to 1995) data to estimate coseismic displacements of the 1951 earthquake sequences. Coseismic displacement progressively decreases firom north to south and the azimuth changes from north to NE, then to a NW direction. According to the inverted faulting mechanism, the Longitudinal Valley fault can be separated into three segments. Both the northern and central segments have a high dip angle to the east, but the southern segment is of listric fault geometry. The northern segment exhibits dominantly left lateral strike-slip faulting with reverse component, while the middle exhibits thrusting dominantly, and the southern segment exhibits thrusting with left-lateral motion associated with a smaller coseismic displacement. In addition, this three-segment deformation model can explain the pattern of recent crustal deformation along the LVF and Coastal Range.

原文English
文章編號B04305
期刊Journal of Geophysical Research: Solid Earth
113
發行號4
DOIs
出版狀態Published - 2008 四月 4

All Science Journal Classification (ASJC) codes

  • 地球物理
  • 地球化學與岩石學
  • 地球與行星科學(雜項)
  • 空間與行星科學

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