Russian Meteor Blast Bigger Than Thought, NASA Says [1]

Tariq Malik Published: February 18, 2013

The meteor that exploded over Russia Friday was slightly larger than previously thought and more powerful, too, NASA scientists say.The Russian meteor explosion [2] over the city of Chelyabinsk, on Friday (Feb. 15), injured more than 1,000 people and blew out windows across the region in a massive blast captured on cameras by frightened witnesses. Friday afternoon, NASA scientists estimated the meteor was space rock about 50 feet (15 meters) and sparked a blast equivalent of a 300-kiloton explosion. The energy estimate was later increased to 470 kilotons

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