Slow crustal deformation of Haiyuan fault in the northeast Tibetan plateau observed by PS-InSAR.

We attempted to detect tiny interseismic crustal deformation on the Haiyuan fault using the PS-InSAR method and 17 ENVISAT/ASAR images in descending orbit. The result shows that homogeneity and consistency in space, and stability and linear variance in time characterize deformation rates of PS points in study area. Meanwhile conspicuous contrast of deformation rates is present on opposite sides of the Haiyuan fault, with a relative motion rate in line of sight about 5mm/a in the central segment. These estimates are in accordance with the results of 2∼10mm/yr determined by geological and geodetic methods. [ABSTRACT FROM PUBLISHER]