Present-Day Three-Dimensional Deformation across the Ordos Block, China, Derived from InSAR, GPS, and Leveling Observations

The Ordos Block in China experiences tectonic activity and frequent earthquakes due to compression from the Tibetan Plateau extension North Block. This has prompted construction of a high-resolution three-dimensional (3D) deformation field better understand region’s crustal movement. Considering limitations existing geodetic observations, we used InSAR, GPS, leveling observations create high-precision 3D for Spherical wavelet decomposition was separate non-tectonic signals. Short-wavelength fields revealed complex surface patterns caused by groundwater, oil, gas extraction, coal mining. Long-wavelength showed subsidence southern margin block, while interior northeastern margins were uplifted. By combining imaging results seismic velocity structure magnetotellurics, infer that upwelling deep materials beneath leads uplift with tensile strain rates. area south 38°N matches thickening lower crust. weak eastward horizontal movement disappearing near 108°E at support existence asthenosphere flow Qinling orogenic belt.