In case you still don't believe in plate tectonics...

Normally movement of plates that make up the outer layer of the early occurs at a slow rate, approximately 8-16mm/yr or about the rate that a fingernail grows. At the intersection of the African and Arabian plates, the movement has been much more drastic recently. Portions of the Ethiopian rift valley (a rift forms as continental plates move apart from each other creating a rift between the two) in September 2005 moved as much as 8 meters in less than a day! As the plates are moving apart, molten rock is filling the bottom of the gap creating new crust. In approximately 1 million years the Red Sea may flood this lowered area creating a new ocean basin.