3 case files, newest first.
On 6 October 2008 astronomers spotted a small asteroid 19 hours before impact and predicted where it would fall. It exploded over the Nubian Desert in northern Sudan. Students and staff of the University of Khartoum walked the desert and recovered about 600 fragments, named Almahata Sitta.
On 2 June 2018 a telescope in Arizona found a small asteroid eight hours before it struck Earth. It burned up over Botswana, and searchers in the Central Kalahari Game Reserve found pieces of it. Only the third asteroid ever seen before impact.
A cosmic body exploded over the Podkamennaya Tunguska River in Siberia and flattened about 2,000 square kilometres of forest. The first scientific expedition arrived nearly 20 years later and found no crater. Today it is accepted as an airburst of a small asteroid or comet.
