Seismic and Geodetic Crustal Moment-Rates Comparison: New Insights on the Seismic Hazard of Egypt

A comparative analysis of geodetic versus seismic moment-rate estimations makes it possible to distinguish between and aseismic deformation, define the style also reveal potential gaps. This has been performed for Egypt where present-day tectonics seismicity result from long-lasting interaction Nubian, Eurasian, Arabian plates. The data used comprises all available geological tectonic information, an updated Poissonian earthquake catalog (2200 B.C.–2020 A.D.) including historical instrumental datasets, a focal-mechanism solutions (1951–2019), crustal strains Global Navigation Satellite System (GNSS) data. studied region was divided into ten (EG-01 EG-10) sources based mainly on seismicity, focal mechanisms, strain characteristics. delimited cover Gulf Aqaba–Dead Sea Transform Fault system, Suez–Red Rift, besides some active regions along Nile River its delta. For each source, estimation moment-rates performed. Although obtained results cannot be considered definitive, among sources, four them (EG-05, EG-06, EG-08, are characterized by low seismic-geodetic ratios (<20%), reflecting prevailing behavior. Intermediate (from 20% 60%) have in additional zones (EG-01, EG-04, EG-07, EG-09), evidencing how accounts minor moderate fraction total deformational budget. In other two (EG-02 EG-03), high (>60%) observed, fully deformation.