"All plates are moving relative to all others. There are grounds for suggesting that the African plate may now be approximately fixed relative to the deep mantle, but if so it is the only such plate. Velocities of relative motion between adjacent plates range from less than 1 centimeter (a small fraction of an inch) to about 13 centimeters (5 inches) per year. Although these velocities are slow by human standards, they are extremely rapid by geologic ones: a motion of 5 centimeters (2 inches) per year, for example, adds up to 50 kilometers (30 miles) in only 1 million years, and some plate motions have been continuous for 100 million years." USGS
FAIR USE NOTICE:
This site may at times contain copyrighted material the use of which has not always been specifically authorized by the copyright owner. We are making such material available in our efforts to advance understanding of environmental, political, human rights, economic, democracy, scientific, and social justice issues, etc. We believe this constitutes a 'fair use' of any such copyrighted material as provided for in section 107 of the US Copyright Law. If you wish to use copyrighted material from this site for purposes of your own that go beyond 'fair use', you must obtain permission from the copyright owner.
For more information go to: http://www.law.cornell.edu/uscode/17/107.shtml