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One year after the Chelyabinsk event: what we do and do not know

Wednesday, March 5, 2014
Natasha
Artemieva

On February 15 2013 thousands of people observed a bright bolide in the sky above Ural Mountains in Russia. A few minutes later a powerful sonic boom arrived breaking windows and injuring people. Intensive scientific observations (infrasound, light flash, seismic signal) combined with numerous amateur video recordings allow to reconstruct the event in great detail including the initial mass, velocity, and trajectory of the asteroid. Available numerical models allow to reproduce practically all observations except of a substantial deficiency of the total recovered mass of meteorites (<0.1% of the initial mass). We will discuss possible short-comings of the existing models, probability of similar events in the future, importance of mass media and education. 

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