The tectonic setting of Lebanon is characterized by three important fault systems. Inland, the two left-lateral strike-slip Yammouneh Fault and Rachaiya - Serghaya Faults. The third is a large thrust fault system located offshore Lebanon. So far the knowledge of the fault systems inland is restricted to a few places along the Yammouneh fault and along the Serghaya Fault. The knowledge of the offshore thrust system is limited to one survey. The project aims at filling these gaps through work on hazard studies, an assessment of physical vulnerabilities and a first order probabilistic seismic hazard analysis for Lebanon.
Purpose and Objectives
To grasp the seismic risk in three main aspects, namely: Hazard, Physical Vulnerability and Social Vulnerability.
Task 1: identification of active faults and past ruptures
Task 2: Instantaneous fault kinematics and present-day fault monitoring
Task 3: Crustal tomography and fault monitoring
Task 4: Site effects and strong ground motion prediction
Task 5: Issues related to probabilistic seismic hazard assessment in Beirut
Task 6: Identify vulnerabilities (vulnerable elements of population, infrastructure, environment)
Assess timing and sequence of ruptures on the major faults
Examine and assess the deformation field, present-day and quaternary slip-rates and space-slip rate variations
Fault identification, crustal structure and fault interaction ad depth
Fault monitoring and detection of potential transient deformation
Assess subsidence as a proxy for site effects evaluation in Beirut
Integrate side effects in probabilistic seismic hazard analysis
Preliminary assessment of physical and societal vulnerabilities