Earth Sciences Research Journal | |
Analysis of aeromagnetic data for interpretation of seismicity at Fayoum-Cairo area, Egypt | |
Khalil, Ahmed1  Hassoup, Awad3  Mansour, Khamis1  Toni, Mostafa2  | |
[1] National Research Institute of Astronomy and Geophysics, Helwan, Egypt$$Kyushu University, Fukuoka, Japan$$;Helwan University, Cairo, Egypt$$;National Research Institute of Astronomy and Geophysics, Helwan, Egypt$$ | |
关键词: Seismicity; aeromagnetic data; structural trends; Fayoum-Cairo; Egypt.; | |
DOI : 10.15446/esrj.v18n1.36938 | |
学科分类:天文学(综合) | |
来源: Universidad Nacional de Colombia * Departamento de Geociencias | |
【 摘 要 】
An aeromagnetic reconnaissance study is presented to delineate the subsurface structure and tectonic setting at the Fayoum-Cairo district, which experienced a damaging earthquake on October 12, 1992 of magnitude (M = 5.7). Analysis of aeromagnetic and seismicity data demonstrate three significant tectonic faults with trending to the NE-SW, NW-SE and E-W. The basement is uplifted in the northern and central parts with a depth of 1.3 km, and deepening in the southern part with a depth of 2.5 km. This is a seismically active zone and historically has experienced damaging earthquakes. In 1847, a damaging earthquake with maximum epicentral intensity (Modified Mercalli Intensity (MMI) = VII) was located there. On the eastern side, earthquake sources are well recognized at different locations. These sources created events of moderate size magnitude M < 5. The focal mechanisms of the major events from these sources are generally strike-slip with normal component. The focal mechanism of the earthquake on October 12, 1992 is normal fault type with strike trends in the NW-SE direction. These fault plane solutions are consistent with the tectonic trends derived from the aeromagnetic data mentioned above and suggest that the new tectonics of northeast Africa is predominant.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
---|---|---|---|
RO201912040506066ZK.pdf | 3524KB | download |