Nine years of GPS measurements of crustal deformation at Imphal, Indo-Burmese wedge

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• 作者：Laishram Sunil Singh (1)
  V. K. Gahalaut (2)
  Arun Kumar (1)
  
• 关键词：GPS ; Crustal deformation ; Indo ; Burmese wedge ; Manipur
• 刊名：Journal of the Geological Society of India
• 出版年：2014
• 出版时间：May 2014
• 年：2014
• 卷：83
• 期：5
• 页码：513-516
• 全文大小：
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• 作者单位：Laishram Sunil Singh (1)
  V. K. Gahalaut (2)
  Arun Kumar (1)
  
  1. Department of Earth Sciences, Manipur University, Imphal, 795 003, India
  2. CSIR-National Geophysical Research Institute, Hyderabad, 500 606, India
  
• ISSN：0974-6889

文摘

We report results of 9 years of GPS measurements of crustal deformation at Imphal, Manipur, a site located in the Indo-Burmese wedge of northwest Sunda arc. The analysis of these measurements suggests that the site moves at a rate of about 36.3±0.5 mm/year towards N55° in the ITRF2008. With respect to the Indian plate it moves at a rate of 16.7 mm/year towards N222°, i.e., predominantly towards southwest. The site is located about 15 km east of the Churachandpur Mao fault (CMF), which is reported to accommodate part of the India-Sunda motion. The site motion is not significantly affected by the earthquakes that occurred in the nearby region. However, the 2004 Sumatra-Andaman earthquake caused a coseismic displacement of ?3- mm predominantly towards southwest. The site motion is almost linear, with some seasonal variation, and does not show any evidence of accelerated slip or slow earthquake on the CMF or along the plate boundary.