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Seismicity and Seismotectonics of the Sudan and South Sudan
Current Issue
Volume 2, 2015
Issue 5 (September)
Pages: 142-149   |   Vol. 2, No. 5, September 2015   |   Follow on         
Paper in PDF Downloads: 58   Since Sep. 16, 2015 Views: 2374   Since Sep. 16, 2015
Naila M. O. Babiker, Seismological Research Institute, National Center for Research, Khartoum, Sudan.
Abdel Halim H. El Nadi, Department of Geology, University of Khartoum, Khartoum, Sudan.
Abdel Hafiz G. Mula, Department of Geology, University of Khartoum, Khartoum, Sudan.
Ali A. M. Eisawi, Department of Petroleum Geology, Al Neelain University, Khartoum, Sudan.
Earthquake data collected from regional and international seismological stations was compiled in order to produce a seismicity map for the Sudan and South Sudan. The seismicity and tectonic information were used to identify the relationship between the distribution of earthquakes and active geological structures and further to create seismic source zones. The results showed that the study area lies within seismically-active region which can be divided into three major seismic source zones, namely the Southern Seismic Source Zone (SSSZ; Ms=7.2), the Northeastern Seismic Source Zone (NSSZ; mb=5.9), the Central Seismic Source Zone (CSSZ; Ms=5.5). The SSSZ is bounded by latitudes 3º00̀ and 10°00̀ N and longitudes 22º00̀ and 36°00̀ E. The seismic activity associated with this zone is attributed to the extension of the western branch of the East African Rift System into South Sudan, or possibly related to rejuvenation of movement in the fault-bounded basins of South Sudan. The NSSZ is located to the west of the presently active seismicity along the Red Sea trough. The third zone seismicity is possibly related to rejuvenation of movement along the Central African Shear Zone (CASZ). Additional minor seismic activity is probably related to Cenozoic volcanicity in Jebel Merra and Bayuda volcanic fields.
Seismicity, Seismotectonics, Seismic Source Zone, Sudan, South Sudan
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