Overview
Asteroid Day is an annual global event which is held on June 30, the anniversary of the Tunguska event in 1908 when a meteor air burst levelled about 2,150 km2 (830 mi2) of forest in Siberia, Russia.
Asteroid Day is an annual global event which is held on June 30, the anniversary of the Tunguska event in 1908 when a meteor air burst levelled about 2,150 km2 (830 mi2) of forest in Siberia, Russia.