InSAR observations of strain accumulation and fault creep along the Chaman Fault system, Pakistan and Afghanistan

Heresh Fattahi, Falk Amelung

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

We use 2004–2011 Envisat synthetic aperture radar imagery and InSAR time series methods to estimate the contemporary rates of strain accumulation in the Chaman Fault system in Pakistan and Afghanistan. At 29 N we find long-term slip rates of 16 ± 2.3 mm/yr for the Ghazaband Fault and of 8 ± 3.1 mm/yr for the Chaman Fault. This makes the Ghazaband Fault one of the most hazardous faults of the plate boundary zone. We further identify a 340 km long segment displaying aseismic surface creep along the Chaman Fault, with maximum surface creep rate of 8.1 ± 2 mm/yr. The observation that the Chaman Fault accommodates only 30% of the relative plate motion between India and Eurasia implies that the remainder is accommodated south and east of the Katawaz block microplate.

Original languageEnglish (US)
Pages (from-to)8399-8406
Number of pages8
JournalGeophysical Research Letters
Volume43
Issue number16
DOIs
StatePublished - Aug 28 2016

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Keywords

  • Chaman Fault
  • InSAR
  • earthquake hazard
  • fault creep
  • plate motion
  • strain accumulation

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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