This edited book is based on the accepted papers for presentation at the 3rd MedGU Annual Meeting, Istanbul 2023. With four parts spanning a large spectrum of geological and geophysical topics, this book presents a series of newest research studies that are nowadays relevant to Middle East, Mediterranean region, and Africa. The book includes the latest research studies on seismic hazard and risk assessment, earthquake geodesy, seismotectonics, archeoseismology, and active faulting, well logging methods, geodesy and exploration/theoretical geophysics, petroleum geochemistry, petroleum engineering, structural geology, basement architecture and potential data, tectonics and geodynamics, and thermicity, petroleum, and other georesources.