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Old February 16 2013, 09:25 PM   #12
publiusr
Commodore
 
Re: Meteor shockwave causes mayhem

Size chart
http://www.space.com/19829-russian-f...fographic.html

Program tonight on Science Channel:
http://blogs.discovery.com/inscider/...or-mayhem.html

The estimated size of the object, prior to entering Earth’s atmosphere, has been revised upward from 49 feet (15 meters) to 55 feet (17 meters), and its estimated mass has increased from 7,000 to 10,000 tons. Also, the estimate for energy released during the event has increased by 30 kilotons to nearly 500 kilotons of energy released. These new estimates were generated using new data that had been collected by five additional infrasound stations located around the world – the first recording the event being in Alaska, over 6,500 kilometers away from Chelyabinsk. The infrasound data indicates that the event, from atmospheric entry to the meteor’s airborne disintegration took 32.5 seconds:
http://www.nasa.gov/mission_pages/as...d20130215.html

More
http://cosmoquest.org/forum/showthre...ls-over-Russia
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