Spectral and photometric characteristics of mid-latitude auroras during the magnetic storm of March 17, 2015

Михалев, А. В.; Beletsky, Aleksandr; Васильев, Роман; Vasilyev, Roman; Жеребцов, Г. А.; Zherebtsov, G. A.; Подлесный, Степан; Podlesny, Stepan; Tashchilin, Mikhail; Артамонов, Максим

doi:10.12737/szf-44201806

Cited by 6 publications

(4 citation statements)

References 14 publications

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“…During night hours on March 17, 2015, the complex of optical instruments installed in the ISTP SB RAS Geophysical Observatory ISTP (GPhO, the village of Tory, geographic coordinates φ=52° N, λ=103° E, corrected geomagnetic latitude φ'=47.9°) detected intense 557.7 and 630.0 nm atomic oxygen emissions, defined as mid-latitude aurora Mikhalev, 2019]. On the basis of space-time dynamics of the intensities, the authors of the above papers have concluded that the synchronous bursts of 557.7 and 630.0 nm emissions, which lasted for about an hour, observed on that day were type «a» auroras; and the slowly varying 630.0 nm emission component was represented by diffuse airglow and/or type «d» aurora, as well as by a stable auroral red arc (SAR arc).…”

Section: Introductionmentioning

confidence: 99%

“…According to the information collected to date, the aurora types identified in Mikhalev, 2019] are associated with the electron fluxes of specific energies precipitating into the atmosphere from various magnetospheric regions [Bame et al, 1967;Rassoul et al, 1993;Frey, 2007;Feldstein et al, 2010;Feldstein et al, 2014;Mishin et al, 2018;Mikhalev, 2019]. Type «a» auroras are excited by electrons with energies ~0.1-10 keV, which come to the auroral oval from the central plasma sheet after significant acceleration.…”

Section: Introductionmentioning

confidence: 99%

“…Vertical lines indicate the beginning and the end of optical observations (12:00-22:30 UT, March 17); the horizontal line is the GPhO latitude (Tory) [Hairston et al, 2016]; the nightside auroral oval expanded to φ'~50° [Le et al, 2016;Kosar et al, 2018]; centers of auroral electrojets shifted to φ'~55° [Jacobsen, Andalsvik, 2016;Zolotukhina et al, 2016;Zolotukhina et al, 2017]. At around the same time, MIT shifted at λ=120 °E to φ=52° N (φ'~48°) [Polekh et al, 2016], and the 557.7 (I 557.7 ) and 630.0 nm (I 630.0 ) emission intensities , observed at GPhO in a northerly direction, sharply increased to maximum values of ~0.5 and 14 kR respectively for the event considered Mikhalev, 2019].…”

Section: Introductionmentioning

confidence: 99%

“…For example, during the past two solar cycles GPhO has detected only seven such cases. All of them occurred during severe and extreme magnetic storms with minimum Dst<-222 nT, including the storm we analyze [Mikhalev, 2019].…”

Section: Introductionmentioning

confidence: 99%

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Peculiarities of 630.0 and 557.7 nm emissions in the main ionospheric trough: March 17, 2015

Золотухина

Полех

Михалев

et al. 2021

Solar-Terrestrial Physics

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Peculiarities of 557.7 and 630.0 nm emissions observed in the second step of the magnetic storm main phase at the mid-latitude observatory Tory (52° N, 103° E) on March 17, 2015 are compared with the changes in ionospheric parameters above this station, detected from ionospheric sounding data and total electron content maps. We have found that the intensity of the 557.7 and 630.0 nm emissions noticeably increased after the observatory entered into the longitudinal sector of the developed main ionospheric trough (MIT). The most powerful synchronous increases in intensities of the two emissions are associated with amplification of the westward electrojet during strengthening of the magnetospheric convection. We study the dependence of the ratios between the intensities of 630.0 nm emission recorded in the north, zenith, and south directions on the position of emitting regions relative to the MIT bottom. The SAR arc is shown to appear initially near the bottom of the MIT polar wall and approach the zenith of the station during registration of F3s reflections by an ionosonde, which indicate the presence of a polarization jet near the observation point.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Peculiarities of 630.0 and 557.7 nm emissions in the main ionospheric trough: March 17, 2015

Золотухина

Полех

Михалев

et al. 2021

Solar-Terrestrial Physics

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Auroras during extreme geomagnetic storms: Some features of mid-latitude aurora on February 11, 1958

Mikhalev

2024

Solnechno-Zemnaya Fizika

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This paper discusses peculiarities of the great mid-latitude aurora that occurred during the extreme magnetic storm on February 11, 1958. This mid-latitude aurora had unusual optical and spectral characteristics, among which, first of all, were very high (10⁵–10⁸ R) intensities of atomic oxygen [OI] 630.0 nm emission and an unusually high ratio of the intensities of two forbidden lines of oxygen [OI] 630.0 nm and 557.7 nm (I₆₃₀/I₅₅₇.₇). In some points, this ratio was as high as 10³–10⁴. Analysis of I₆₃₀ dynamics during other extreme geomagnetic storms and associated geophysical conditions and physical processes in Earth’s ionosphere and magnetosphere allows us to assume that great mid-latitude auroras are formed during intense substorms in main phases of magnetic storms. In order to interpret the observed features of the February 11, 1958 mid-latitude aurora, we propose to examine the mechanism of level [OI] ¹D selective filling in which reactions of resonance recharge of oxygen ions O⁺(²D)+O (³P)→O⁺(⁴S)+O(³P, ¹D) and/or reactions of oxygen atom and molecule collisions with excited components of odd nitrogen can be implemented.

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Mid-Latitude Aurora in Solar Cycles 23–24 From Observations in the South of Eastern Siberia

Михалев

2019

Solnechno-Zemnaya Fizika

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The paper presents observations of mid-latitude aurora (MA) in the south of Eastern Siberia in solar cycles 23–24. Spectral composition and dominant emissions of MA, daily distribution of MA detection probability, dependence on the level of geomagnetic activity, and classification according to types of aurora are discussed. A close relationship is shown between the intensity of dominant emission at 630.0 nm and the Dst index during magnetic storms (MSs). It is pointed out that the most intense MA are recorded during MS main phases. The MA detected on November 20, 2003 can enlarge the list of great aurora. For the severe MSs (Dstmin< –200 nT) of March 24, 1991, April 6, 2000, October 30 and November 20, 2003, March 17, 2015, the observed dynamics of 557.7 and 630.0 nm auroral emissions is presented. Mechanisms of emission excitation during geomagnetic storms and a possible connection with magnetospheric structures are discussed.

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Spectral and photometric characteristics of mid-latitude auroras during the magnetic storm of March 17, 2015

Cited by 6 publications

References 14 publications

Peculiarities of 630.0 and 557.7 nm emissions in the main ionospheric trough: March 17, 2015

Peculiarities of 630.0 and 557.7 nm emissions in the main ionospheric trough: March 17, 2015

Auroras during extreme geomagnetic storms: Some features of mid-latitude aurora on February 11, 1958

Mid-Latitude Aurora in Solar Cycles 23–24 From Observations in the South of Eastern Siberia

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