A smaller air burst occurred over a populated area in Russia on 15 February 2013 , at Chelyabinsk in the Ural district of Russia . The exploding meteoroid was an asteroid that measured about 17 to 20 metres across , with an estimated initial mass of 11,000 tonnes and which exploded with an energy release of approximately 500 kilotons . It inflicted over 1,200 injuries , mainly from broken glass falling from windows shattered by its shock wave
smaller air burst
Chelyabinsk meteor
Tunguska event