Abstract The Nanga Parbat–Haramosh Massif located in the northwestern syntaxis of the Himalaya is an antiformal structure considered as a crustal diapir undergoing exhumation at a rate larger than 10 mm/yr since 1 Ma. Using GNSS horizontal surface velocities and a vertical and east–west decomposition of the Sentinel‐1 interferometric line‐of‐sight velocities, we quantify the present‐day ground deformation of this massif. Based on these velocity fields, the surrounding Plateaus appear stable, exhibiting only surficial downslope movements likely related to rock glacier or permafrost deformation. The Nanga Parbat massif is dominated by uplift reaching up to 6 mm/yr but also shows an asymmetry of the horizontal displacement across the massif. South of latitude 35.3°N, the massif is characterized by uplift only whereas, between latitudes 35.3°N and 35.7°N, the western part of the massif exhibits westward displacement along a major thrust while the eastern part is only affected by vertical displacement. At last, the northern part of the massif seems to be affected by uplift but also by significant southward displacement. The InSAR velocity profiles reveals the presence of normal faults with no preferential dipping direction located in the extension side ( extrados ) of the crustal fold that are accommodating local extension. The inversion of co‐seismic InSAR displacements shows that they are related to slip on a fault with geometry compatible with the focal mechanism of a Mw 5.1 earthquake in 2019. Therefore, we suggest that the massif consists of a ductile core undergoing vertical flow, overlain by a brittle carapace affected by active faulting.
Meyer et al. (Wed,) studied this question.