InSAR observations of strain accumulation and fault creep along the Chaman Fault system, Pakistan and Afghanistan
نویسندگان
چکیده
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.At29Nwefind long-termslip ratesof16 ± 2.3mm/yr for theGhazabandFault andof8 ± 3.1mm/yr for the Chaman Fault. This makes the Ghazaband Fault one of themost hazardous faults of the plate boundary zone. We further identify a 340 km long segment displaying aseismic surface creep along the Chaman Fault, withmaximumsurface creep rateof 8.1 ± 2mm/yr. Theobservation that theChamanFault accommodatesonly 30%of the relative platemotionbetween India and Eurasia implies that the remainder is accommodated south and east of the Katawaz block microplate.
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