A geophysical investigation of the urban-expanding area over the seismologically active Dahshour region, Egypt

Arafa-Hamed, Tarek; Marzouk, Hossam; Elbarbary, Samah; Abdel Zaher, Mohamed

doi:10.1007/s11600-023-01131-3

Artykuł - szczegóły

Tytuł artykułu

A geophysical investigation of the urban-expanding area over the seismologically active Dahshour region, Egypt

Autorzy

Arafa-Hamed Tarek , Marzouk Hossam , Elbarbary Samah , Abdel Zaher Mohamed

Wybrane pełne teksty z tego czasopisma

https://www.springer.com/journal/11600

Identyfikatory

DOI

10.1007/s11600-023-01131-3

Warianty tytułu

Języki publikacji

Abstrakty

Western Desert region between Cairo and Fayoum in Egypt is a geologically interesting area due to its active seismicity status and the continuous bidirectional urban expansions ongoing northward and southward growth. This work aims to develop a geological model of the region by combining magnetic intensity data (aeromagnetic) and potential field data (airborne gravity) with magnetotelluric (MT) data to offer decision-makers an additional evaluation tool for long-term future planning. Applying a number of filters to aerial gravity and magnetic data allowed us to calculate the subsurface density distribution and structure of the area between Cairo and Fayoum. In addition, the surface of the crust was imaged down to a depth of 6 km using a 3-D inversion of gravity data. Magnetotelluric data were gathered at eight locations over the NS-extended Cairo-Fayoum Road profile. MT data were inverted in 2-D to generate a resistivity model that defines the subsurface structure of the researched region. The subsurface geometry in the MT-derived resistivity model agrees with the results of airborne potential measurements, and no consideration was given to any faults that may have been undetected from the potential maps. Long-term seismological observations indicated that the likely active sources of earthquakes are limited to the recognized main faults and that the ongoing “1185 buildings” construction project did not and will not cause unanticipated seismicity. The paper concludes that urban growth is secure so long as the earthquake codes are rigorously considered while planning civil projects. The northern study region must be regularly monitored for induced seismicity. On the Cairo-Fayoum Road's western side, the middle sector of the study area is the safest place for future civil developments.

Słowa kluczowe

aeromagnetics airborne gravity magnetotelluric electrical resistivity Dahshur Cairo-Fayoum Egypt

aeromagnetyka grawitacja powietrzna magnetotelluryka oporność elektryczna Dahszur Kair-Fajum Egipt

Wydawca

Instytut Geofizyki PAN
Springer

Czasopismo

Acta Geophysica

Rocznik

2024

Tom

Vol. 72, no. 2

Strony

743--757

Opis fizyczny

Bibliogr. 44 poz.

Twórcy

autor

Arafa-Hamed Tarek

geointernational@netscape.net

National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo 11421, Egypt

autor

Marzouk Hossam

National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo 11421, Egypt
Present Address: Now at Institute of Geophysics, University of Münster, Corrensstr. 24, 48149 Münster, Germany

autor

Elbarbary Samah

National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo 11421, Egypt

autor

Abdel Zaher Mohamed

National Research Institute of Astronomy and Geophysics (NRIAG), Helwan, Cairo 11421, Egypt

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Typ dokumentu

Bibliografia

Identyfikator YADDA

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