<P> The total surface area of Earth is about 510 million km ( 197 million sq mi ) . Of this , 70.8 % , or 361.13 million km ( 139.43 million sq mi ) , is below sea level and covered by ocean water . Below the ocean 's surface are much of the continental shelf , mountains , volcanoes , oceanic trenches , submarine canyons , oceanic plateaus , abyssal plains , and a globe - spanning mid-ocean ridge system . The remaining 29.2 % , or 148.94 million km ( 57.51 million sq mi ) , not covered by water has terrain that varies greatly from place to place and consists of mountains , deserts , plains , plateaus , and other landforms . Tectonics and erosion , volcanic eruptions , flooding , weathering , glaciation , the growth of coral reefs , and meteorite impacts are among the processes that constantly reshape the Earth 's surface over geological time . </P>
<P> The total surface area of Earth is about 510 million km ( 197 million sq mi ) . Of this , 70.8 % , or 361.13 million km ( 139.43 million sq mi ) , is below sea level and covered by ocean water . Below the ocean 's surface are much of the continental shelf , mountains , volcanoes , oceanic trenches , submarine canyons , oceanic plateaus , abyssal plains , and a globe - spanning mid-ocean ridge system . The remaining 29.2 % , or 148.94 million km ( 57.51 million sq mi ) , not covered by water has terrain that varies greatly from place to place and consists of mountains , deserts , plains , plateaus , and other landforms . Tectonics and erosion , volcanic eruptions , flooding , weathering , glaciation , the growth of coral reefs , and meteorite impacts are among the processes that constantly reshape the Earth 's surface over geological time . </P>
what is the surface area of the earth
what is the surface area of the earth
about 510 million km ( 197 million sq mi )
about 510 million km ( 197 million sq mi )