Tunguska event
One of the best-known impacts recorded in historical times is the 50 meter 1908 Tunguska event, which leveled several thousand square kilometers of forest in a very sparsely populated part of Siberia, Russia. Such an impact over a more populous region would have caused locally catastrophic damage. The 2013 Chelyabinsk meteor event is the only known impact in historical times to have resulted in a large number of injuries, with the potential exception of the possibly highly deadly but poorly documented 1490 Ch'ing-yang event in China. The approximately 20 meter Chelyabinsk meteor is the largest recorded object to have impacted a continent of the Earth since the Tunguska event.