Sudbury Basin is the second-largest crater on Earth , after the 300 km ( 190 mi ) Vredefort crater in South Africa , and larger than the 180 km ( 110 mi ) Chicxulub crater in Yucatán , Mexico .
Sudbury Basin would then be the second-largest crater on Earth , after the 300 km ( 190 mi ) Vredefort crater in South Africa , and larger than the 170 km ( 110 mi ) Chicxulub crater in Yucatán , Mexico .