Geomorphological studies are significant for understanding fault dynamics and assessing their seismic hazard, particularly in offshore regions where direct observation is limited. The North-South Faults (NSF), analyzed using ultra-high-resolution bathymetric data, reveal a complex seafloor expression characterized by multiple fault scarps and pockmarks. Through geometric analysis of morphotectonic parameters along the fault segments, we identified patterns of fault growth and segmentation, with a particular focus on transfer zones and intricate fault linkages. Cumulative vertical displacement varies from centimeters to decameters, with the largest displacements typically observed in the northern sections of the fault segments. These height variations, along with segment lengths and linkage patterns, indicate northward fault propagation, suggesting the NSF is in the early stages of development within a left-lateral transtensional system. Furthermore, our findings support the interpretation of the NSF as the northern extension of the Al-Idrissi Fault, emphasizing its significance for seismic hazard assessment in the region. Finally, we propose that NSF may represent a potential seismic source for a magnitude 6.1 Mw earthquake and suggest it as an alternative source of the 1910 Adra earthquake. This study offers new insights into the early growth and evolution of transtensional fault systems worldwide and their associated seismic potential.
