February, 2013, the Chelyabinsk Meteor exploded at a height of 30 kilometers over western Russia. The meteor, which weighed around , was estimated to be traveling and entered Earth's atmosphere at an angle of 20 degrees. The explosion was between 20-30 times stronger than the bomb dropped on Hiroshima; the resulting shock wave broke windows on the ground and injured around 1,500 people. Due to the meteor's relatively shallow angle it exploded high in Earth atmosphere. However, had the meteor reached Earth's surface or exploded lower in the atmosphere the results could have been catastrophic.