# Seismic and Geodetic Crustal Moment-Rates Comparison: New Insights on the Seismic Hazard of Egypt
## 3 Preparation of an Updated and Unified Earthquake Catalog  
As a first step towards the delimitation of areal seismic sources and the estimation of relevant seismicity parameters, an earthquake catalog was compiled from the beginning taking into account previous catalogs. A spatial region extending from 24\({}^{\circ}\) to 38\({}^{\circ}\) E longitudes and from 221\({}^{\circ}\) to 34\({}^{\circ}\) N latitudes was considered, within the period starting from 2200 B.C. until 2020. In the compilation, all shallow earthquakes (h \(<\) 35 km) above magnitude 3.0 on any magnitude scale were gathered. Several catalogs, bulletins, and publications were inspected and gathered to compile the dataset. * The Poissonian earthquake catalog by [PERSON] et al. (2008) for Egypt was considered as a priority since they considered both historical and instrumental earthquakes, covering large spatial (the whole territory of Egypt) and temporal extension (2200 B.C.-2014). The final number of earthquakes gathered from this catalog was 22,054 events. * The local instrumental earthquake catalog of the Egyptian National Seismic Network was published by [PERSON] et al. (2009). They considered the time period from 1997 to 2019. A number of 1.543 earthquakes from this reference (including magnitudes equal to or greater than 3.0) was also included in our catalog. * An additional number of earthquakes (4885 events) were collected from the Israel National Seismic Network (FDSN; [[https://www.fdsn.org/networks/detail/IS/](https://www.fdsn.org/networks/detail/IS/)]([https://www.fdsn.org/networks/detail/IS/](https://www.fdsn.org/networks/detail/IS/)); last accessed on 1 June 2021) in addition to other related publications (e.g., (2020)). * The instrumental earthquake catalog developed by [PERSON] et al. (2011) for the Arabian Peninsula was also considered, especially for the Red Sea region. Their catalog covers the period between 1900 and 2015, and 974 earthquakes from it were considered to be included in our database. * Besides these local bulletins and catalogs (for Egypt, Israel, and the Arabian Peninsula), data from regional and international bulletins were also gathered. Within the period from 2014 until the present, a number of 393, 12, and 73 earthquakes in this region have been collected from the International Seismological Centre (ISC; [[http://www.isc.ac.uk/iscbullet/search/](http://www.isc.ac.uk/iscbullet/search/)]([http://www.isc.ac.uk/iscbullet/search/](http://www.isc.ac.uk/iscbullet/search/)); last accessed on 1 June 2021), the ISC-EHB bulletin  
Figure 1: Compiled global tectonic sketch for Egypt and its surrounding regions (the middle plot: after ([PERSON] et al., 2008)), the Nile Delta region (the left plot (**a**): after ([PERSON] et al., 2008)), and the Sinai Peninsula and the Dead Sea regions (the right plot (**b**): after ([PERSON] et al., 2008; [PERSON] et al., 2009; [PERSON] et al., 2010)). Abbreviations for the geographic features, faults, and shear zones are included in the legend. ([[http://www.isc.ac.uk/isc-ehb/](http://www.isc.ac.uk/isc-ehb/)]([http://www.isc.ac.uk/isc-ehb/](http://www.isc.ac.uk/isc-ehb/)); last accessed on 1 June 2021), and the National Earthquake Information Center, United States Geological Survey (USGS; [[https://earthquake.usgs.gov/earthquakes/search/](https://earthquake.usgs.gov/earthquakes/search/)]([https://earthquake.usgs.gov/earthquakes/search/](https://earthquake.usgs.gov/earthquakes/search/)); last accessed on 1 June 2021), respectively. When merging the previously mentioned data (a total of 29,934 earthquakes), it was crucial to avoid any possible duplication. The compiled dataset is described by the following parameters for each specific earthquake: year, month, and day for the date; hour, minute, and second for the time; longitude and latitude for the geographic location; depth value; and the reported magnitude(s) (body-wave \"mb\", surface-wave \"Ms\", moment \"Mw\", duration \"MD\", and local \"ML\" magnitudes).