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Tag archives: meteorites

Chelyabinsk exposed: the anatomy of an asteroid impact

Photo of Chelyabinsk meteorite fragment

Exhibit A: a 4 cm-wide meteorite created by the Chelyabinsk asteroid explosion with “shock veins” in it. (Courtesy: Science/AAAS)

By Matin Durrani

If there is one thing that will be remembered about Friday 15 February 2013, it’s that it was the day when a massive asteroid blew up above the city of Chelyabinsk in Russia – creating the largest explosion on the planet since the one that occurred over the Tunguska river in Siberia in 1908.

But whereas hardly anyone saw or recorded information about the Tunguska explosion, the Chelyabinsk asteroid blew up over a relatively densely populated region and – perhaps more importantly – its journey through the air was recorded by numerous cameras and webcams that nervous Russian drivers love to install on their cars. Video footage of the event was soon seen by people all over the world.

Now, based on data from those videos and visits to some 50 local villages, researchers from the Czech Republic and Canada have published a paper in the journal Science detailing the trajectory, structure and origin of what they call the “Chelyabinsk asteroidal impactor”. The paper goes live on Thursday 7 November.

To save you the trouble of reading the full article, I’ve picked out a couple of factoids that might intrigue and interest you.

(more…)

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