The 1990 to 1991 Sudan Earthquake Sequence and the Extent of the East African Rift System

@article{Girdler1994The1T,
  title={The 1990 to 1991 Sudan Earthquake Sequence and the Extent of the East African Rift System},
  author={Ronald W. Girdler and David A. McConnell},
  journal={Science},
  year={1994},
  volume={264},
  pages={67 - 70}
}
One of the largest earthquakes ever recorded in Africa (surface wave magnitude Ms = 7.2) occurred about 50 kilometers east of the Upper River Nile on 20 May 1990. Four days later, two more large earthquakes (Ms = 6.4 and 7.0) occurred about 50 kilometers to the northwest in the Nile Valley. In the following months, a further 60 events were recorded by seismic stations worldwide. The earthquakes are associated with two fault systems: one east of the Nile with azimuth southeast and one along the… 
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