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The 2013 Chelyabinsk meteor event is the only known such incident in modern times to result in a large number of injuries, excluding the 1490 Ch'ing-yang event in China. The Chelyabinsk meteor is the largest recorded object to have encountered the Earth since the Tunguska event. The Comet ShoemakerâLevy 9 impact provided the first direct observation of an extraterrestrial collision of Solar System objects, when the comet broke apart and collided with Jupiter in July 1994.
Vredefort crater, or dome, is the largest verified impact crater on earth, and can be found around the town of Vredefort in the Free State Province of South Africa. The asteroid that hit Vredefort is estimated to be the largest to hit earth in the last 4 billion years, and was over 15km (9.3mi) in diameter. The resulting crater is just over 300km (186.4mi) in diameter, and its huge size has earned it a title as a world heritage site.