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Earthquake recurrence estimation of Dahshour area, Cairo, Egypt, using earthquake and GPS data

Author

Listed:
  • Mohamed Saleh

    (National Research Institute of Astronomy and Geophysics (NRIAG)
    EOST Université de Strasbourg)

  • Mahmoud Elhadidy

    (National Research Institute of Astronomy and Geophysics (NRIAG)
    ICTP)

  • Frédéric Masson

    (EOST Université de Strasbourg)

  • Ali Rayan

    (National Research Institute of Astronomy and Geophysics (NRIAG))

  • Abdel-Monem S. Mohamed

    (National Research Institute of Astronomy and Geophysics (NRIAG))

  • Nadia Abou-Aly

    (National Research Institute of Astronomy and Geophysics (NRIAG))

Abstract

On Oct. 12, 1992, Cairo was shocked by an earthquake with a moment magnitude Mw = 5.8. It is considered the most severe earthquake that hit Egypt in the twentieth century. It caused damage, deaths, and home collapses. Recently, mega-projects associated with public infrastructures are running around Cairo. Therefore, considering such seismic activity and related ground deformation is vital for the sustainability of these projects. The estimation of such an earthquake's recurrence rate is very important for future seismic hazard and seismic risk assessments. Here, we use 11 years of GPS data (epoch and permanent sites) to map the ground motion of the area west of Cairo (Dahshour seismic source). In addition to GPS data, an earthquake catalog considering historical and instrumental seismicity records is used to calculate the recurrence rate of the 1992 Cairo earthquake. The earthquake catalog is processed through magnitude unifying, de-clustering, and performing completeness analysis. In the Nubia fixed frame, GPS sites show a systematic trend of the north-to-northeastward motion. A slip rate of 1.4 ± 0.4 mm/year along the fault is estimated. Based on the estimated slip rate obtained from GPS and seismicity analysis, an average recurrence frequency for the Cairo earthquake of 107–116 years is estimated.

Suggested Citation

  • Mohamed Saleh & Mahmoud Elhadidy & Frédéric Masson & Ali Rayan & Abdel-Monem S. Mohamed & Nadia Abou-Aly, 2023. "Earthquake recurrence estimation of Dahshour area, Cairo, Egypt, using earthquake and GPS data," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 116(3), pages 3565-3582, April.
    • Handle: RePEc:spr:nathaz:v:116:y:2023:i:3:d:10.1007_s11069-023-05825-1
    DOI: 10.1007/s11069-023-05825-1
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    References listed on IDEAS

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    1. Omar Hamdy & Hanan Gaber & Mohamed S. Abdalzaher & Mahmoud Elhadidy, 2022. "Identifying Exposure of Urban Area to Certain Seismic Hazard Using Machine Learning and GIS: A Case Study of Greater Cairo," Sustainability, MDPI, vol. 14(17), pages 1-24, August.
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