For comparison, a large meteor that fell over Chelyabinsk Oblast in Russia in 2013, was 18 meters in diameter. It exploded during its descent about 30 kilometers (18.6 miles) above the ground, showering the surrounding area with debris and triggering a shockwave that shattered the windows of houses, injuring many. Scientists estimated that it had the same explosive power as about 440,000 tons of TNT, according to NASA.