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Three felt earthquakes with moderate local magnitudes range from 3.7 to 4.5 Richter are located southeast Luxor, south Egypt. The investigated events represents the largest instrumental earthquake to be recorded during the period from 1997 to 2024 in the southeast Luxor seismic zone, south Egypt. The most recent earthquake of January 2024 with local magnitude 4.5 was felt in various cities located close to and around the epicentral region such as Luxor, New Tiba, New Luxor, Armant, Esna, and Aswan areas. Full waveform moment tensor inversion is used to dedicate the fault planes orientation of the investigated earthquakes. The optimum source parameters accompanied with maximum fitting and the best double couple mechanism of the investigated events indicated that strike slip movement are dominated. The estimated values of the moment magnitude and seismic moment of December 2015, December 2022, and January 2023, are: 3.7, 1.43e + 21 dyne-cm; 3.3, 1.20e + 21 dyne-cm; and 4.4, 3.31e + 22 dyne-cm, respectively. The stochastic simulation method depending on the site spectral model is used to estimate the effect and strong ground motions parameters of the largest earthquake in January 2024 at the new planned constructed cities including New Luxor city and New Tiba city. The modulated parameters are represents as the peaks value of ground acceleration (PGA), ground velocity (PGV), ground displacement (PGD), and the pseudo spectral acceleration (PSA). The derived results revealed that the PGA (8.6 cm/s2), the PGV (0.22 cm/s), and the PGD (0.02 cm) simulated at New Luxor city with epicentral distance 38 km, while the modulated strong ground motion parameters at New Tiba city with epicentral distance 40 km are PGA (7.3 cm/s2), PGV (0.18 cm/s), and PGD (0.02 cm). The highest values of PSA are (24.82 cm/s2), and (21.23 cm/s2) at New Luxor and New Tiba cities are obtained, respectively. Although, the investigated events are moderate, they generate great interest for earthquake hazard along this active zone.

ABSTRACTIn this work, we publish a moment-local magnitude scale catalogue for the Egyptian National Seismic Network (ENSN) since 1997 to 2019 as necessary for the study of seismicity and seismic hazard estimation. Every year, the ENSN publish an annual bulletin of local and regional earthquakes recorded by the network with local magnitude (Ml) scale. The ENSN was recorded more than 36,730 approximately for local events since 1997. In this work, the Moment magnitudes (Mw) are computed for small earthquakes using a spectral analysis method, while the Moment magnitudes of moderate and large earthquakes are obtained using a complete waveform inversion and moment tensor techniques. An empirical relationship between moment magnitude (Mw) and local magnitude (Ml) of the earthquakes are developed using a linear regression. The Mw–Ml relationship used in this study was as follows:Mw = 0.69 Ml + 0.58 for earthquakes with magnitude ≤3Mw = 0.95 Ml – 0.15 for earthquakes with magnitude 3< ML≤6The ENSN local magnitude (Ml) catalogue was converted to a moment magnitude (Mw) catalogue and attached as a supplementary material with this article for use by the researchers and authors in tectonic studies and seismic hazard evaluation of the region.