The Balkans Peninsula, known for its mountainous terrain, is one of Europe's most seismic regions. Recent destructive earthquakes, such as in Montenegro (1979, Mw 6.9) and Dürres (2019, Mw 6.4), underline the region's geodynamic complexity. Despite this, the area remains poorly instrumented compared to regions like Italy or Turkey. Latest GNSS studies over the area (e.g., Piña‐Valdés et al., 2022) indicate slow regional velocities (

To address this, we take advantage from Sentinel-1 data processed by FLATSIM (Thollard et al., 2019), providing InSAR displacement time series and velocity maps with millimeter precision and 120m resolution over 360,000 km² of the Balkans. Using a modified ITRF referencing method (Lemrabet et al., 2023), we derived the first large-scale InSAR velocity field for the region. Profiles of line-of-sight velocities reveal detailed deformation patterns along active structures, such as the Dinaric thrusts, the Ohrid graben, and Gulf of Corinth faults.

By decomposing velocities into horizontal and vertical components, we highlight InSAR's ability to complement GNSS data via various wavelength signal profiles, offering unprecedented insights about area and its tectonics. This dataset provides a foundation for exploring tectonic processes and transient phenomena in a region historically impacted by seismic hazards.

Keywords: InSAR, GNSS, Balkans, tectonics, interseismic deformation, subsidence