Amateur footage of the meteor that exploded above the Russian city of Chelyabinsk on the morning of 15th February 2013. The meteor entered the atmosphere and exploded at an altitude of some 15-25 kilometres, causing a shock wave that shattered windows and damaged buildings, and caused nearly 1500 injuries. Scientists estimated that the meteorite weighed around 10,000 tonnes, had a diameter of around 17 metres, and entered the atmosphere at a speed of 17.9 kilometres per second. The main air burst had an energy of nearly 500 kilotons, more than thirty times greater than the atomic bomb dropped on Hiroshima.