Papyrus Press Advance Researches in Civil Engineering 2645-7229 6 2 2024 06 01 An Overview of the Seismic Activity in Behbahan City, Southwest Iran 50 64 224608 10.30469/arce.2025.519969.1086 EN Amin Nakhlian Center of monitoring assessment and prediction of natural disasters (MAP), Behbahan Khatam Alanbia University of Technology, Behbahan, Iran Lotfolla Emadali Assistant professor, Department of Civil Engineering, Engineering Faculty, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran Sasan Motaghed Faculty of Engineering, Behbahan Khatam Alanbia University of Technology, Behbahan, Iran Heshmatolla Mahmudian Lorestan National University of Skills Nasrolla Eftekhari Faculty of Technology and Mining, Yasouj University, Choram, Iran Journal Article 2025 04 29 This study examines the seismic activity and hazards in Behbahan City, southwestern Iran, situated within the seismically active Zagros Fold-Thrust Belt. Historical earthquakes, including devastating events in 1052 and 1085 AD, highlight the region's vulnerability. The area is characterized by ongoing crustal shortening due to the Arabian-Eurasian plate convergence, with several active faults, such as the Behbahan, Aghajari, and Arjan faults, posing significant threats. Analysis of regional seismotectonic frameworks reveals that Behbahan is consistently classified as a high-seismic-hazard zone, with potential for earthquakes exceeding magnitude 7.0. Our fault analysis identifies the Behbahan Fault as posing the highest immediate risk, with an estimated moment magnitude of 7.35 at a distance of 8.4 km from the city. The study recommends microzonation studies, retrofitting of vulnerable structures (especially unreinforced masonry buildings), implementation of early-warning systems, and the development of revised peak ground acceleration (PGA) maps. Multi-disciplinary research integrating InSAR, paleoseismology, and geotechnical data is crucial for refining hazard assessments and mitigating future earthquake impacts in this historically significant and densely populated region. https://www.arce.ir/article_224608_bba3e233a2f418f44f60db9e3976543b.pdf