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pure and applied geophysics

, Volume 163, Issue 1, pp 1–18 | Cite as

Combination of Precise Leveling and InSAR Data to Constrain Source Parameters of the Mw = 6.5, 26 December 2003 Bam Earthquake

  • Mahdi Motagh
  • Jürgen Klotz
  • Farokh Tavakoli
  • Yahya Djamour
  • Siavash Arabi
  • Hans-Ulrich Wetzel
  • Jochen Zschau
Article

Abstract

We used new precise leveling data acquired 40 days after the Bam earthquake in combination with radar interferometry observations from both ascending and descending orbits to investigate static deformation associated with the 2003 Bam earthquake. We invert this geodetic data set to gain insight into the fault geometry and slip distribution of the rupture. The best-fitting dislocation model is a steeply east-dipping right-lateral strike-slip fault that has a size of 11 by 8 km and strikes N2°W. We find that such smooth geometry fits available geodetic data better than previously proposed models for this earthquake. Our distributed slip model indicates a maximum strike slip of 3 m occurring about 3 to 5 km deep. The slip magnitude and depth of faulting taper to the north, where the fault approaches the Bam city. Inclusion of crustal layering increases the amount of maximum slip inferred at depth by about 4%.

Keywords

InSAR leveling 

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Copyright information

© Birkhäuser Verlag, Basel, 2005

Authors and Affiliations

  • Mahdi Motagh
    • 1
  • Jürgen Klotz
    • 1
  • Farokh Tavakoli
    • 2
  • Yahya Djamour
    • 3
  • Siavash Arabi
    • 3
  • Hans-Ulrich Wetzel
    • 1
  • Jochen Zschau
    • 1
  1. 1.GeoForschungsZentrum Potsdam (GFZ)PotsdamGermany
  2. 2.Laboratoire de Geophysique Interne et TectonophysiqueMaison des GeosciencesGrenoble Cedex 9France
  3. 3.National Cartographic Center of Iran (NCC)TehranIran

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