The key role of conjugate fault system in importing earthquakes into the eastern flank of the Red Sea

Abstract This study aims to synthesize seismic observations with gravity and magnetic data suggest a new scenario on the development of Harrat Lunayyir (HL) tectonic system eastern Red Sea coastline, Saudi Arabia. Gravity aeromagnetic anomalies distinctly mapped NE NW trends, while InSAR depict small NW–SE graben an dyke. High-resolution relocations, which are well-consistent focal mechanism solutions for events magnitudes greater than 3.0, admit two fault styles different orientations. Thus, leading planes’ reactivation related Precambrian basement faults rift system, respectively. The spatiotemporal distributions epicenters deformation 2009 earthquake activity. low static frictions 0.2–0.35 obtained from stress inversion indicates preexisting in respective seismogenic zones. results give rise swarm-like sequence implications, activated differently oriented, conjugate inherited region, plays vital role transferring ambient regime into Sea’s flank.