Astronomical and physical aspects of the Chelyabinsk event (February 15, 2013)

Emel’yanenko, V. V.; Попова, О. П.; Чугай, Н. Н.; Shelyakov, M. A.; Pakhomov, Yu. V.; Шустов, Б. М.; Шувалов, В. В.; Biryukov, E. E.; Rybnov, Yu. S.; Marov, M. Ya.; Рыхлова, Л. В.; Naroenkov, S. A.; Карташова, А. П.; Харламов, В. А.; Trubetskaya, I. A.

doi:10.1134/s0038094613040114

Cited by 74 publications

(52 citation statements)

References 10 publications

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“…According to visual data [see, for example, Emel'yanenko et al , ; Popova et al , ], the fragmentation of Chelyabinsk meteor was accompanied by a series of explosions. At the same time, there is only one strong oscillation recorded at the nearest seismic station ARU (epicentral distance ≈250 km) and there are no significant oscillations corresponding secondary explosions (Figure i), except only a number of weak surface wave packets, probably from Tonga event (discussed, for example, in Tauzin et al []).…”

Section: Observationsmentioning

confidence: 99%

Toward the azimuthal characteristics of ionospheric and seismic effects of “Chelyabinsk” meteorite fall according to the data from coherent radar, GPS, and seismic networks

et al. 2015

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We present the results of a study of the azimuthal characteristics of ionospheric and seismic effects of the meteorite ‘Chelyabinsk,’ based on the data from the network of GPS receivers, coherent decameter radar EKB, and network of seismic stations, located near the meteorite fall trajectory. It is shown that 6–14 min after the bolide explosion, GPS network observed the cone‐shaped wavefront of traveling ionospheric disturbances (TIDs) that is interpreted as a ballistic acoustic wave. The typical TIDs propagation velocity were observed 661 ± 256 m/s, which corresponds to the expected acoustic wave speed for 240 km height. Fourteen minutes after the bolide explosion, at distances of 200 km, we observed the emergence and propagation of a TID with annular wavefront that is interpreted as gravitational mode of internal atmospheric waves. The propagation velocity of this TID was 337 ± 89 m/s which corresponds to the propagation velocity of these waves in similar situations. At EKB radar, we observed TIDs in the sector of azimuthal angles close to the perpendicular to the meteorite trajectory. The observed TID velocity (400 m/s) and azimuthal properties correlate well with the model of ballistic wave propagating at 120–140 km altitude. It is shown that the azimuthal distribution of the amplitude of vertical seismic oscillations with periods 3–60 s can be described qualitatively by the model of vertical strike‐slip rupture, propagating at 1 km/s along the meteorite fall trajectory to distance of about 40 km. These parameters correspond to the direction and velocity of propagation of the ballistic wave peak by the ground. It is shown that the model of ballistic wave caused by supersonic motion and burning of the meteorite in the upper atmosphere can satisfactorily explain the various azimuthal ionospheric effects, observed by the coherent decameter radar EKB, GPS receivers network, and the azimuthal characteristics of seismic waves at large distances.

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Section: Observationsmentioning

confidence: 99%

Toward the azimuthal characteristics of ionospheric and seismic effects of “Chelyabinsk” meteorite fall according to the data from coherent radar, GPS, and seismic networks

et al. 2015

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“…These sizes are based on clarification in the reference paper. 10) For example, the estimated size of the Chelyabinsk meteor is 16-19 m, 1) which caused an "air burst." On the other hand, the size of the asteroid that produced the "Barringer Crater" located in Arizona is estimated to be about 40 m.…”

Section: Configuration Of Simulationmentioning

confidence: 99%

“…In fact, on February 4th, 2013, a NEO the size of about 20 m in diameter entered the Earth's atmosphere over Chelyabinsk, Russia, and exploded at an altitude of about 20 km, damaging about 4,500 buildings and injuring about 1,500 residents. 1,2) The impact energy was approximately 500 kilotons of TNT, which is about 30 times larger than that of the atomic bomb detonated over Hiroshima. As of today, it was the worst NEO hazard in the history of mankind.…”

Section: Introductionmentioning

confidence: 99%

Mission Design for NEO Detection and Impact Warning System

Ikenaga¹,

Gagliardi

Ikeda³

et al. 2016

Trans. Japan Soc. Aero. S Sci.

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On February 15th, 2013, a meteor with size of about 20 m in diameter entered the Earth's atmosphere over Chelyabinsk, Russia, and exploded at an altitude of about 20 km, damaging about 4,500 buildings and injuring about 1,500 residents. This incident widely invoked an interest in hazard mitigation caused by a NEO. Motivated by such interests, this study focuses on a new concept of NEO detection and impact warning system. In this concept, a space telescope is placed at the L1 point of the Sun-Earth system to intensively observe the NEOs in-coming from the noon-side, which groundbased observatories hardly detect because of the sunlight. Throughout some cases of simulations, this paper reveals the distributions of NEO directions at detection, V-infinity vectors at the Earth impact, and the NEO orbit determination precision are evaluated.

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“…It is the largest of the known celestial bodies which have fallen to the ground after the Tunguska meteorite in 1908. The following characteristics of the Chelyabinsk meteorite are given in recent publications (Zetser, 2014;Ionov, 2013;Kopeikin et al, 2013;Emel'yanenko et al, 2013;Popova et al, 2013;Berngardt et al, 2013;Gokhberg et al, 2013;Krasnov et al, 2014;Seleznev et al, 2013;De Groot-Hedlin and Hedlin, 2014):…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of the 2013 meteorite entry in Lake Chebarkul, Russia

Козелков

Kurkin

Pelinovsky

et al. 2017

Nat. Hazards Earth Syst. Sci.

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Abstract. The results of the numerical simulation of possible hydrodynamic perturbations in Lake Chebarkul (Russia) as a consequence of the meteorite fall of 2013 (15 February) are presented. The numerical modeling is based on the Navier-Stokes equations for a two-phase fluid. The results of the simulation of a meteorite entering the water at an angle of 20 • are given. Numerical experiments are carried out both when the lake is covered with ice and when it is not. The estimation of size of the destructed ice cover is made. It is shown that the size of the observed ice hole at the place of the meteorite fall is in good agreement with the theoretical predictions, as well as with other estimates. The heights of tsunami waves generated by a small meteorite entering the lake are small enough (a few centimeters) according to the estimations. However, the danger of a tsunami of meteorite or asteroid origin should not be underestimated.

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Astronomical and physical aspects of the Chelyabinsk event (February 15, 2013)

Cited by 74 publications

References 10 publications

Toward the azimuthal characteristics of ionospheric and seismic effects of “Chelyabinsk” meteorite fall according to the data from coherent radar, GPS, and seismic networks

Toward the azimuthal characteristics of ionospheric and seismic effects of “Chelyabinsk” meteorite fall according to the data from coherent radar, GPS, and seismic networks

Mission Design for NEO Detection and Impact Warning System

Numerical modeling of the 2013 meteorite entry in Lake Chebarkul, Russia

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