On the development of a seismic source zonation model for seismic hazard assessment in western Saudi Arabia

Zahran, Hani; Sokolov, Vladimir; Roobol, M. J.; Stewart, Ian; Youssef, S. M.; El-Hadidy, Mahmoud

doi:10.1007/s10950-016-9555-y

Cited by 29 publications

(4 citation statements)

References 90 publications

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“…The model for the Arabian Peninsula (Zahran et al, 2015, 2016) was developed by the Saudi Geological Survey (SGS). The SSC includes two SSMs that comprise area sources with identical geometry, but differing rates.…”

Section: The Components Of the Mosaic And Their General Characteristicsmentioning

confidence: 99%

The 2018 version of the Global Earthquake Model: Hazard component

et al. 2020

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In December 2018, at the conclusion of its second implementation phase, the Global Earthquake Model (GEM) Foundation released its first version of a map outlining the spatial distribution of seismic hazard at a global scale. The map is the result of an extensive, joint effort combining the results obtained from a collection of probabilistic seismic hazard models, called the GEM Mosaic. Together, the map and the underlying database of models provide an up-to-date view of the earthquake threat globally. In addition, using the Mosaic, a synopsis of the current state-of-practice in modeling probabilistic seismic hazard at national and regional scales is possible. The process adopted for the compilation of the Mosaic adhered to the maximum extent possible to GEM’s principles of collaboration, inclusiveness, transparency, and reproducibility. For each region, priority was given to seismic hazard models either developed by well-recognized national agencies or by large collaborative projects involving local scientists. The version of the GEM Mosaic presented herein contains 30 probabilistic seismic hazard models, 14 of which represent national or sub-national models; the remainder are regional-scale models. We discuss the general qualities of these models, the underlying framework of the database, and the outlook for the Mosaic’s utility and its future versions.

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Section: The Components Of the Mosaic And Their General Characteristicsmentioning

confidence: 99%

The 2018 version of the Global Earthquake Model: Hazard component

et al. 2020

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“…1). In particular, the southernmost zone of deformation includes the well-known seismic zone of Jizan, Saudi Arabia, characterized by strong events associated with right-lateral strike-slip deformation (Zahran et al 2016;Abdelfattah et al 2017). This seismicity can be only explained assuming that the axial zone south of 15.26 • N is not fully oceanic.…”

Section: G E O P H Y S I C a L E V I D E N C E O F P O S T -R I F T C O N T R A C T I O Nmentioning

confidence: 99%

“…The seismicity of this area, which includes the continental margin of Arabia in the Jeddah-Makkah region, has been studied by several authors (e.g. Al-Saud 2008;Fnais et al 2015;Zahran et al 2016). Basically, it is characterized by dextral strike-slip motion along major shear zones, such as the Ad Damm Fault and the Fatima Structural Lineament (FSL; Fig.…”

Section: G E O P H Y S I C a L E V I D E N C E O F P O S T -R I F T C O N T R A C T I O Nmentioning

confidence: 99%

Rift–drift transition in the Red Sea: a rheological model of the early stage of seafloor spreading

Schettino

Ranalli

Fierro

et al. 2019

Geophysical Journal International

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We present a rheological model of the continental lithosphere during the rift-drift transition, founded on theoretical considerations, numerical modelling, and supported by geophysical and geological evidence from the Red Sea region. The model is based on the fundamental assumption that during the rifting phase the necking lithospheric mantle of the conjugate continental margins retains and accumulates elastic strain. This hypothesis is tested numerically, and thereby it is shown that during the phase of extension the uppermost mantle has the capability to store and maintain recoverable elastic strain over geological times, differently from the upper crust, which exhibits a continuous short-term irreversible deformation by seismic release. After the onset of seafloor spreading, strain recovery and release of the strain energy accumulated in the lithospheric mantle occurs through a phase of non-linear anelastic relaxation. During this phase, the upper crust of the conjugate continental margins experiences post-rift deformation with tectonic inversion of former extensional structures, while the extra space created along the axial zone as a consequence of the rapid contraction of the margins triggers a rapid upwelling of the asthenosphere that induces an initial pulse of fast spreading followed by a steady phase of oceanic crust accretion. We present geophysical evidence supporting this model, including: (1) the observed pattern of oceanic magnetic anomalies in the Red Sea, (2) the distribution of finite crustal strains across the continental margins of Nubia and Arabia, and (3) the distribution of earthquake epicentres along the western margin of the Arabian Plate. We also present new structural data acquired during three geological campaigns performed in 2015 and 2016 along the western Arabian margin, which are consistent with a post-rift phase of compression and inversion of the rift structures. We will also show that a selection of realistic rheological parameters supports non-linear viscoelastic behaviour of the continental lithosphere during the rift-drift transition. Finally, we will show that in the case of the Red Sea ∼40 per cent of the total extensional strain accumulated during the rifting stage has been recovered in the southernmost part of the Arabian margin conjugate to the Nubian Plate (∼19 • N), while this percentage decreases to ∼14 per cent around 23.8 • N, where the continental margin faces the youngest spreading segment, and it is zero north of this area, where the Red Sea is still in the rifting stage. Taking into account of the age of oceanization along the central and northern Red Sea, this implies an average recovery of ∼10 per cent Myr -1 .

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“…The Republic of Yemen has a long history of seismic and volcanic activity related to its location in the southwestern Arabian Peninsula and eastern Africa (Somalia, Djibouti, and Eritrea), part of the active Arabian tectonic plate. Active spreading of the Arabian plate from the African plate along the Red Sea, Gulf of Aden, and Afar depression produces shallow intrusive magmatic activity near the Arabian plate's southwestern border, which is an important factor in the control of seismic activity in Yemen ( Figure 1 ) [ 1 ]. Seismotectonic settings in and around Yemen strongly indicate the possibility of major earthquakes, especially in Dhamar and along the Arabian plate borders, which may inflict considerable damage to Yemeni structures.…”

Section: Introductionmentioning

confidence: 99%

Assessment of seismic hazards in Yemen

Alrubaidi

Al-Haddad

Al-Safi

et al. 2021

Heliyon

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The seismic hazard analyses for Yemen have attracted the attention of researchers during the last two decades. However, the studies are limited and mainly use deterministic or approximate conventional probabilistic approaches. The conclusions drawn from these studies do not fit with current seismic design codes (International Building Code). This article presented the method and findings of a probabilistic seismic hazard assessment for Yemen in accordance with current seismic design building regulations. All the data sources, available nationally and internationally, were utilized in compiling earthquake database by covering the recent records and the seismic activity maps of the study region. The study area was regionalized to 11 seismotectonic area sources on the basis of the seismicity maps and available tectonic maps. On the analytical side, the earthquake recurrence analysis was evaluated for each source, and logic tree concept was used to model the seismic sources that may have significant effect on seismic hazard evaluation of Yemen as a combination of area and line sources. A probabilistic forecasting model was formulated, appropriate ground motion attenuation relationships were used, and seismic hazard contour maps were developed for the entire Yemen area. The maps present dense contours of peak ground accelerations and short and long period spectral accelerations for different return periods. The highest predicted seismic hazard is found in Dhamar City. This study provides basic and essential requirements that will be valuable in developing advanced seismic design criteria for Yemen.

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On the development of a seismic source zonation model for seismic hazard assessment in western Saudi Arabia

Cited by 29 publications

References 90 publications

The 2018 version of the Global Earthquake Model: Hazard component

The 2018 version of the Global Earthquake Model: Hazard component

Rift–drift transition in the Red Sea: a rheological model of the early stage of seafloor spreading

Assessment of seismic hazards in Yemen

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