<Tr> <Th> Speed </Th> <Td> 27--34 mm (1.1--1.3 in) / year </Td> </Tr> <Tr> <Th> Features </Th> <Td> South America, Atlantic Ocean </Td> </Tr> <Tr> <Td_colspan="2"> Relative to the African Plate </Td> </Tr> <P> The South American Plate is a major tectonic plate which includes the continent of South America as well as a sizable region of the Atlantic Ocean seabed extending eastward to the African Plate, with which it forms the southern part of the Mid-Atlantic Ridge . </P>

Where do most earthquakes occur in south america