  A multi-parameter analysis was conducted to evaluate the impact of
meteorological parameters, night sky brightness and seismic hazard on proposed
sites for the new optical/infrared Egyptian astronomical telescope. The ERA5
reanalysis data set is used to get the following meteorological parameters:
Total cloud coverage fraction, precipitable water vapor, relative humidity,
wind speed & direction and Air temperature. To estimate the aerosol optical
depth we used the Modern-Era Retrospective analysis for Research and
Applications version 2 (MERRA-2). Light pollution over the candidate sites was
measured from Visible Infrared Imaging Radiometer Suite (VIIRS) Day Night Band
(DNB). The seismic input in terms of maximum acceleration and response spectra
were computed using a physics-based ground motion approach to assess the
seismic hazards and consequently the designation of seismic resistant structure
for the proposed sites to be able to assess the seismic hazards for the
candidate sites. Of the seven nominated sites, two sites are found to have the
best measurements and might be considered future sites for the new Egyptian
Astronomical telescope. The first site is located in the south of the Sinai
peninsula, while the second one is located in the Red Sea mountains region.
