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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.
Nasa scientists at the time said the shockwave caused by the crash was greater than 30 Hiroshima nuclear bombs and was so powerful it travelled twice around the world. The Russian meteor hit the Earth just hours before an asteroid called 2012 DA14 was spotted nearby but the two incidents were not found to be related.