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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nature

ISSN

0028-0836

e-ISSN

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Svazek periodika

503

Číslo periodika v rámci svazku

7475

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

4

Strana od-do

238-241

Kód UT WoS článku

000326894200046

EID výsledku v databázi Scopus

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