Ionospheric effects induced by the Chelyabinsk meteor

Givishvili, G. V.; Leshchenko, L. N.; Alpatov, V. V.; Grigor'eva, S. A.; Журавлев, С. В.; Кузнецов, В. Д.; Kusonskii, O. A.; Lapshin, V. B.; Rybakov, M.

doi:10.1134/s0038094613040138

Cited by 15 publications

(6 citation statements)

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“…We selected the moment and position of this event as the reference point in the following analysis. The Chelyabinsk meteoroid caused various effects in the geomagnetic field, lithosphere and atmosphere [ Brown et al ., ; Berngardt et al ., , ; Gorkavyi et al ., ; Givishvili et al ., ; Gokhberg et al ., ; Tauzin et al ., ; Yang et al ., ].…”

Section: Introductionmentioning

confidence: 97%

“…A significant ionospheric response to the Chelyabinsk event was detected by different instruments and methods. Large‐scale ionospheric waves and traveling ionospheric disturbances (TIDs) were imaged using low‐orbit satellites tomography, ionosondes, and a coherent radar over the western part of Russia and Siberia a few hours after the fireball explosion [ Givishvili et al ., ; Berngardt et al ., , ]. A short‐term burst in the electron density and abnormal mesoscale irregularity in the E layer, radial wave propagation at 250, 400, and 800 m/s velocities in the F layer were also detected by the coherent radar as far as 100–1500 km from the airburst [ Berngardt et al ., , ].…”

Section: Introductionmentioning

confidence: 99%

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Ionospheric disturbances in the vicinity of the Chelyabinsk meteoroid explosive disruption as inferred from dense GPS observations

Перевалова

Shestakov

Voeykov

et al. 2015

Geophysical Research Letters

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The paper describes results of studying effects of total electron content (TEC) variations triggered by the Chelyabinsk meteoroid airburst as inferred from unique data of a dense GPS network located around the final part of the meteoroid atmospheric path. Well‐pronounced TEC disturbances with an average period of about 10 min and amplitude of 0.07–0.5 TECU (total electron content unit, 1 TECU = 1016 el m−2) were detected. These disturbances were initiated by an ionospheric source activated about 5–6 min after the airburst. The disturbance velocity damping with time and distance from the airburst was revealed using a GPS interferometric technique. Several modes of TEC disturbances with propagation velocities ranging from 250 to 660 m/s were distinguished through the distance‐time diagram analysis. The estimated position of ionospheric source of TEC disturbances is shifted 36 km southwestward from the airburst, which is most likely to be associated with the conjoint influence of TEC data errors, damping and anisotropy of TID propagation velocity.

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Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Ionospheric disturbances in the vicinity of the Chelyabinsk meteoroid explosive disruption as inferred from dense GPS observations

Перевалова

Shestakov

Voeykov

et al. 2015

Geophysical Research Letters

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“…Traveling ionospheric disturbances (TIDs) generated by the "Chelyabinsk" meteorite were detected by various instruments: ionosondes and low-orbit satellites tomography Givishvili et al, 2013], coherent decameter EKB radar [Berngardt et al, 2013a], and GPS [Gokhberg et al, 2013;Berngardt et al, 2013a;Yang et al, 2014;Ruzhin et al, 2014;Chernogor, 2015;Perevalova et al, 2015;Tertyshnikov et al, 2013].…”

Section: Introductionmentioning

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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“…Previously, there have been several reports on the observation of ionospheric effects likely caused by this meteor explosion as well. One of these reports was based on the examination of scaled parameters from vertical radio sounding measurements (e.g., f o F 2 and h m F 2 ) combined with ionospheric tomography reconstruction at a longitude sector around Moscow [Givishvili et al, 2013]. Other reports were based on the analysis of total electron content (TEC) measurements from multiple ground-based GPS receiver networks [Gokhberg et al, 2013;Yang et al, 2014;Perevalova et al, 2015].…”

Section: Introductionmentioning

confidence: 99%

Ionosonde observations of ionospheric disturbances due to the 15 February 2013 Chelyabinsk meteor explosion

2015

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We report the results of our investigations on the potential ionospheric effects caused by the 15 February 2013 Chelyabinsk meteor explosion. We used the data from a number of digisonde stations located in Europe and Russia to detect the traveling ionospheric disturbances (TIDs) likely to have been caused by the meteor explosion. We found that certain characteristic signatures of the TIDs can be identified in individual ionogram records, mostly in the form of Y‐forking/splitting of the ionogram traces. Based on the arrival times of the disturbances, we have inferred the overall propagation speed of the TIDs from Chelyabinsk to be 171 ± 14 m/s.

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Ionospheric effects induced by the Chelyabinsk meteor

Cited by 15 publications

References 1 publication

Ionospheric disturbances in the vicinity of the Chelyabinsk meteoroid explosive disruption as inferred from dense GPS observations

Ionospheric disturbances in the vicinity of the Chelyabinsk meteoroid explosive disruption as inferred from dense GPS observations

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

Ionosonde observations of ionospheric disturbances due to the 15 February 2013 Chelyabinsk meteor explosion

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