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Probabilistic Seismic Hazard Assessment for United Arab Emirates, Qatar and Bahrain

Research Authors
Rashad Sawires, José A. Peláez, and Mohamed Hamdache
Research Abstract

A probabilistic seismic hazard assessment in terms of peak ground acceleration (PGA)
and spectral acceleration (SA) values, for both 10% and 5% probability of exceedance in 50 years,
has been performed for the United Arab Emirates, Qatar, and Bahrain. To do that, an updated, unified,
and Poissonian earthquake catalog (since 685 to 2019) was prepared for this work. Three alternative
seismic source models were considered in a designed logic-tree framework. The discrimination
between the shallow and intermediate depth seismicity along the Zagros and the Makran regions
was also considered in this assessment. Three alternative ground-motion attenuation models for
crustal earthquakes and one additional for intermediate-depth ones have been selected and applied
in this study, considering the predominant stress regime computed previously for each defined
source. This assessment highlights that the maximum obtained hazard values are observed in the
northeastern part of the studied region, specifically at Ras Al-Khaimah, Umm Al-Quwain, and
Fujaira, being characterized by mean PGA and SA (0.2 s) pair values equal to (0.13 g, 0.30 g), (0.12 g,
0.29 g), and (0.13 g, 0.28 g), respectively, for a 475-year return period and for B/C National Earthquake
Hazards Reduction Program (NEHRP) boundary site conditions. Seismic hazard deaggregation in
terms of magnitude and distance was also computed for a return period of 475 years, for ten emirates
and cities, and for four di erent spectral periods.

Research Department
Research Journal
Applied Sciences-Basel MDPI
Research Member
Research Publisher
NULL
Research Rank
1
Research Vol
10
Research Website
https://www.mdpi.com/2076-3417/10/21/7901
Research Year
2020
Research Pages
7901