Delineation and characterization of a new seismic source model for seismic hazard studies in Egypt

Sawires, Rashad; Peláez, José A.; Ibrahim, Hamza A.; Fat-Helbary, R. E.; Henares, Jesús; Hamdache, Mohamed

doi:10.1007/s11069-015-2034-x

Cited by 24 publications

(9 citation statements)

References 96 publications

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“…The merging process has been performed following the same criteria in Sawires et al . 65–68 . Potential duplicate events displaying a difference in the origin time less than one minute and a difference in their locations less than one latitude/longitude degree have been identified.…”

Section: Methodsmentioning

confidence: 99%

An updated and unified earthquake catalog from 1787 to 2018 for seismic hazard assessment studies in Mexico

et al. 2019

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Here we present a new updated and unified Poissonian earthquake catalog for Mexico. The details about the catalog compilation, the removal of duplicate events, unifying the magnitude scales, removal of dependent events through the declustering process and its completeness analysis are presented. Earthquake and focal mechanism data have been compiled from various local, regional and international sources. Large earthquake events (MW ≥ 6.5) have been carefully revised for their epicentral locations and magnitudes from trusted publications. Different magnitude-conversion relationships, compatible with available local and regional ones, has been established to obtain unified moment magnitude estimates for the whole catalog. Completeness periods for the declustered catalog were estimated for the definition of appropriate seismic source models for the whole territory. The final unified Poissonian earthquake catalog spans from 1787 to 2018, covering a spatial extent of 13° to 33°N and 91° to 117°W. This catalog is compatible with other published catalogs providing basis for new analysis related to seismicity, seismotectonics and seismic hazard assessment in Mexico.

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Section: Methodsmentioning

confidence: 99%

An updated and unified earthquake catalog from 1787 to 2018 for seismic hazard assessment studies in Mexico

et al. 2019

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“…In spite of the definition of some faults (Kalabsha, Seiyal, Gebel El-Barqa, Khur El-Ramla, Kurkur, Abu Dirwa, and Dabud faults) in southern Egypt (around Nasser's Lake) by Woodward Clyde Consultants (1985; see Data and Resources) and Deif et al (2011), we have not included them in the final seismic-hazard computation. This is because there are no available data about the slip rate or the paleoseismological history of these faults, thus we prefer to use only an area source model (Sawires et al, 2015;Sawires, Peláez, Ibrahim, and Fat-Helbary, 2016).…”

Section: Seismic Source Modelmentioning

confidence: 99%

“…This rule is based on the study performed by Abdelwahed et al (2013), which gives a range of 30-39 km to the Moho discontinuity in Egypt. Depths for the 28 defined seismic sources have been estimated separately for each delineated seismic source (see Sawires, Peláez, Ibrahim, and Fat-Helbary, 2016).…”

Section: Seismic Source Modelmentioning

confidence: 99%

“…The prevailing stress field, seismicity parameters, and maximum expected magnitudes (M max ) for those specifically delineated seismic sources (shallow seismic zones for the Egyptian territory and intermediate-depth seismic sources for the Eastern Mediterranean region) have been estimated (Sawires, Peláez, Ibrahim, and Fat-Helbary, 2016). However, the seismicity parameters and M max values for the shallow seismic sources in the Eastern Mediterranean region have been considered to be the same as those values in the SHARE (2013) project.…”

Section: Seismic Source Modelmentioning

confidence: 99%

“…(a) Tectonic framework, (b,c) seismicity of Egypt and nearby regions (2200 B.C.-2013), and the considered seismic source model (b,c) in and around Egypt (afterSawires et al, 2016a;Sawires, Peláez, Ibrahim, and Fat-Helbary, 2016).…”

mentioning

confidence: 99%

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Updated Probabilistic Seismic‐Hazard Values for Egypt

Sawires

Peláez

Fat-Helbary³

et al. 2016

Bulletin of the Seismological Society of America

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Seismic hazard in terms of mean peak ground acceleration (PGA) and spectral acceleration (SA) values has been computed for Egypt using both historical and instrumental earthquake data. For this purpose, an updated earthquake catalog, spanning the time period from 2200 B.C. to 2013, has been compiled for Egypt as well as its surrounding regions and is prepared to be used in a new probabilistic seismichazard assessment of Egypt. The earthquakes sizes were unified in terms of the moment magnitude scale. A new seismic source model for the seismic activity in and around Egypt, consisting of a total of 88 seismic zones (for shallow-and intermediate-depth seismicity), was considered in this new assessment. The seismicity parameters have been specifically computed for 35 seismic sources covering the Egyptian territory and the Eastern Mediterranean region. A logic-tree design was set up to consider the epistemic uncertainty in the Gutenberg-Richter b-value, maximum possible magnitude (M max ), and the selected ground-motion prediction equations. Seismichazard computations for rock-site conditions with 10% and 5% probability of exceedance in 50 years were carried out. In addition, uniform hazard spectra for twelve, among the most important and populated cities in Egypt, are computed and compared with the most recent Egyptian building code values. It is interesting to highlight that the maximum hazard values are observed at the Gulf of Aqaba region, specifically around the epicentral location of the biggest Egyptian recorded earthquake of 22 November 1995 (M w 7.2) Aqaba earthquake. The obtained seismic-hazard values for Nuweiba city (located in this region) for mean PGA and SA (0.1 s) are 0:29g and 0:74g, respectively, for a return period of 475 years.

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Comprehensive Analysis of Seismicity and Seismic Hazard in the Surroundings of the United Arab Emirates

Sawires,

Peláez

2024

Advances in Natural and Technological Hazards Research

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Delineation and characterization of a new seismic source model for seismic hazard studies in Egypt

Cited by 24 publications

References 96 publications

An updated and unified earthquake catalog from 1787 to 2018 for seismic hazard assessment studies in Mexico

An updated and unified earthquake catalog from 1787 to 2018 for seismic hazard assessment studies in Mexico

Updated Probabilistic Seismic‐Hazard Values for Egypt

Comprehensive Analysis of Seismicity and Seismic Hazard in the Surroundings of the United Arab Emirates

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