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Shallow fault-zone dilatancy recovery after the 2003 Bam earthquake in Iran

Author

Listed:
  • Eric J. Fielding

    (Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA)

  • Paul R. Lundgren

    (Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, USA)

  • Roland Bürgmann

    (University of California, Berkeley, California 94720, USA)

  • Gareth J. Funning

    (University of California, Riverside, California 92521, USA)

Abstract

The 2003 Bam earthquake recovery The earthquake that devastated Bam, Iran, in 2003 ruptured a buried fault located directly beneath the city. The earthquake had large slip of more than 2 metres at depths of 3 to 7 km, but much less at the surface. Fielding et al. have used interferometric analysis of synthetic aperture radar images from the Envisat satellite to monitor the area for postseismic response in the fault zone following the earthquake. The mapping reveals localized compaction that indicates both afterslip and poroelastic rebound along parts of the fault, but also healing and compaction of co-seismic dilation in the upper 1 km of the fault zone. Such deformation spread through a fault zone volume may explain the observed shallow slip deficits for some strike-slip fault ruptures.

Suggested Citation

  • Eric J. Fielding & Paul R. Lundgren & Roland Bürgmann & Gareth J. Funning, 2009. "Shallow fault-zone dilatancy recovery after the 2003 Bam earthquake in Iran," Nature, Nature, vol. 458(7234), pages 64-68, March.
    • Handle: RePEc:nat:nature:v:458:y:2009:i:7234:d:10.1038_nature07817
    DOI: 10.1038/nature07817
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    Cited by:

    1. Mohammed Zia & Kanika Sharma & Arun Saraf & Josodhir Das & Suman Baral & Mrinmoy Das, 2014. "Ground deformational studies using ALOS-PALSAR data between 2007 and 2010 of the central Kutch area, Gujarat, India," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 71(3), pages 1379-1388, April.

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