Full ArticleThe meteor -- estimated to be about 10 tons -- entered the Earth's atmosphere at a hypersonic speed of at least 33,000 mph and shattered about 18-32 miles above the ground, the Russian Academy of Sciences said in a statement. It released the energy of several kilotons above the Chelyabinsk region, the academy said.<snip>
The explosions broke more than 1 million square feet of glass, city officials said.