Post-seismic deformation associated with the 2001 Bhuj earthquake

Abstract

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 48–49 mm/year in N46–50°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 3–4 years of the earthquake and is much low now. Our results support the idea that mantle rheology is weak in the region.

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Acknowledgments

The authors wish to thank Prof J R Kayal for critically reviewing the manuscript and Dr B K Rastogi for his kind permission to publish this work. Thanks are also due to Ministry of Earth Sciences, Govt. of India and Department of Science and Technology, Govt. of Gujarat for financial support.

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Correspondence to Pallabee Choudhury.

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Choudhury, P., Catherine, J.K., Gahalaut, V.K. et al. Post-seismic deformation associated with the 2001 Bhuj earthquake. Nat Hazards 65, 1109–1118 (2013). https://doi.org/10.1007/s11069-012-0191-8

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Keywords

  • Global Positioning System (GPS)
  • Post-seismic deformation
  • Bhuj earthquake