Post-seismic deformation associated with the 2001 Bhuj earthquake

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• 作者：Pallabee Choudhury (1)
  J. K. Catherine (2)
  V. K. Gahalaut (2)
  Sumer Chopra (3)
  Rakesh Dumka (1)
  Ketan Singha Roy (1)
  
• 关键词：Global Positioning System (GPS) ; Post ; seismic deformation ; Bhuj earthquake
• 刊名：Natural Hazards
• 出版年：2013
• 出版时间：January 2013
• 年：2013
• 卷：65
• 期：2
• 页码：1109-1118
• 全文大小：494KB
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• 作者单位：Pallabee Choudhury (1)
  J. K. Catherine (2)
  V. K. Gahalaut (2)
  Sumer Chopra (3)
  Rakesh Dumka (1)
  Ketan Singha Roy (1)
  
  1. Institute of Seismological Research, Gandhinagar, Gujarat, India
  2. National Geophysical Research Institute, Hyderabad, India
  3. Seismology Division, Ministry of Earth Sciences, CGO Complex, New Delhi, India
  
• ISSN：1573-0840

文摘

We report the results of GPS measurements of post-seismic deformation due to the 2001 Bhuj earthquake in the Kachchh region, western India. The estimated horizontal velocity vectors in ITRF05 are in the range of 48-9?mm/year in N46-0°E. The observed velocity at the Gandhinagar permanent site, a far off site from the earthquake source region and probably unaffected by the post-seismic deformation, is 49?±?1?mm/year in N47°E, which is consistent with the predicted motion of Indian plate at Gandhinagar. At other sites in the source region, transient post-seismic deformation is found to be low; it attenuated rapidly within 3-?years of the earthquake and is much low now. Our results support the idea that mantle rheology is weak in the region.