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The 2008 Nura Mw6.7 earthquake occurred in front of the Trans-Alai Range, central Asia.We present Interferometric Synthetic Aperture Radar(In SAR) measurements of its coseismic ground deformation that are available for a major earthquake in the region.Analysis of the In SAR data shows that the earthquake ruptured a secondary fault of the Main Pamir Thrust for about 20 km. The fault plane striking N46 E and dipping 48 SE is dominated by thrust slip up to 3 m, most of which is confined to the uppermost 2e5 km of the crust, similar to the nearby 1974 Mw7.0 Markansu earthquake. The elastic model of interseismic deformation constrained by GPS measurements suggests that the two earthquakes may have resulted from the failures of two high-angle reverse faults that are about 10 km apart and rooted in a locked de collement at depths of 5e6 km. The elastic strain is built up by a freely creeping de collement at about 16 mm/a.
The 2008 Nura Mw6.7 million occurred in the Trans-Alai Range, central Asia. We present Interferometric Synthetic Aperture Radar (In SAR) measurements of its coseismic ground deformation that are available for a major earthquake in the region. Analysis of the In SAR data shows that the earthquake ruptured a secondary fault of the Main Pamir Thrust for about 20 km. The fault plane striking N46 E and dipping 48 SE is dominated by thrust slip up to 3 m, most of which is confined to the uppermost 2e5 km of the crust, similar to the nearby 1974 Mw 7.0 Markansu earthquake. The elastic model of olympic deformation constrained by GPS measurements suggests that the two earthquakes may have resulted from the failures of two high-angle reverse faults that are about 10 km apart and rooted in a locked de collement at depths of 5e6 km. The elastic strain is built up by a freely creeping de collement at about 16 mm / a.