A 500-kiloton airburst over Chelyabinsk and an enhanced hazard from small impactors

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F13%3A00399282" target="_blank" >RIV/67985815:_____/13:00399282 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1038/nature12741" target="_blank" >http://dx.doi.org/10.1038/nature12741</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1038/nature12741" target="_blank" >10.1038/nature12741</a>

Result language
angličtina
Original language name
A 500-kiloton airburst over Chelyabinsk and an enhanced hazard from small impactors
Original language description
We report an analysis of the damage from the airburst of an asteroid about 19metres (17 to 20metres) in diameter southeast of Chelyabinsk, Russia, on 15 February 2013, estimated to have an energy equivalent of approximately 500(+/-100) kilotons of trinitrotoluene (TNT, where 1 kiloton of TNT = 4.1851012 joules). We show that a widely referenced technique of estimating airburst damage does not reproduce the observations, and that the mathematical relations based on the effects of nuclear weapons--almostalways used with this technique--overestimate blast damage. This suggests that earlier damage estimates near the threshold impactor size are too high. We performed a global survey of airbursts of a kiloton or more (including Chelyabinsk), and find that the number of impactors with diameters of tens of metres may be an order of magnitude higher than estimates based on other techniques.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BN - Astronomy and celestial mechanics, astrophysics
OECD FORD branch
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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