Altitude distribution analysis of electron fluxes at L=1.2–1.8

Grachev, E. A.; Grigoryan, O. R.; Климов, С. И.; Kudela, K.; Petrov, Alexey; Schwingenschuh, K.; Sheveleva, V.; Stetiarova, J.

doi:10.1016/j.asr.2003.03.078

Cited by 14 publications

(10 citation statements)

References 7 publications

(8 reference statements)

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“…The latitudinal cross-section of energetic particle fluxes during storms exhibits a complex structure comprising several peaks. During various storms, the KORONAS, SERVIS-1, ACTIVE satellites and MIR station recorded peaks in proton and electron fluxes at L ~ 1.1, 1.4, 1.5, 1.7, 1.8, 1.9, 2.1 and 2.2 15 , 22 , 24 , 25 . These peaks are quasi-stationary in terms of time but change their latitudinal position.…”

Section: Discussionmentioning

confidence: 99%

Discovery of a low-latitude ionospheric trough associated with the inner radiation belt

Karpachev

2021

Sci Rep

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The dynamics of ionospheric troughs that developed during a great geomagnetic storm on 11–13 April 2001 are studied using measurements of electron density obtained by the CHAMP satellite at an altitude of 410–465 km. Subauroral, mid-latitude and low-latitude troughs were observed at nighttime, sometimes simultaneously. The subauroral trough is usually defined as the main ionospheric trough, whereas the mid-latitude trough is associated with the magnetospheric ring current. It appeared at the beginning of the storm recovery phase around latitudes of 40°–45° GMLat (L = 1.7–2.0) and existed for a long period of time throughout the late recovery phase of the residual ring current at latitudes of 50°–55° GMLat (L ~ 2.4–3.0). For the first time, a low-latitude trough was revealed. It developed at latitudes of 34°–45° GMLat (L = 1.45–2.00) in association with the precipitation of energetic particles from the inner radiation belt.

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Section: Discussionmentioning

confidence: 99%

Discovery of a low-latitude ionospheric trough associated with the inner radiation belt

Karpachev

2021

Sci Rep

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“…We delimit nearequatorial zone and middle latitude zone because the peaks at L < 1.2 are registered sporadically. Longitudinal dependence is one of the main feature of electron formations at L < 1.2 (Grachev et al, 2005). The formations at 1.2 < L < 1.9 consist of two peaks: a broad weak peak around L $ 1.3 and a relatively narrower peak near L $ 1.7.…”

Section: Observationmentioning

confidence: 97%

Spectral characteristics of electron fluxes at L<2 under the Radiation Belts

Grigoryan¹,

Panasyuk²,

Petrov³

et al. 2008

Advances in Space Research

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“…[9] Modern experiments measure energetic electron fluxes below and inside the IRB. During quiet or weakly disturbed geomagnetic activity, the medium-energy population of the IRB has complex spatial and energy band structures [e.g., Datlowe et al, 1985;Kudela et al, 1992;Biryukov et al, 1998;Grachev et al, 2005;Sauvaud et al, 2006Sauvaud et al, , 2013Grigoryan et al, 2008]. Evans [1988] first reported dramatic enhancements of quasi-trapped energetic electron fluxes at an~850 km in response to large magnetic storms; thereafter, other studies also determined intense fluxes at low-altitudes near the equator [Tanaka et al, 1990;Pinto et al, 1992;Gusev et al, 1995;Asikainen and Mursula, 2005;Suvorova et al, 2012].…”

Section: Introductionmentioning

confidence: 99%

TEC evidence for near‐equatorial energy deposition by 30 keV electrons in the topside ionosphere

et al. 2013

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[1] Observations of energetic electrons (10 -300 keV) by NOAA/POES and DMSP satellites at heights <1000 km during the period from 1999 to 2010 allowed finding abnormal intense fluxes of~10 6 -10 7 cm À2 s À1 sr À1 for quasi-trapped electrons appearing within the forbidden zone of low latitudes over the African, Indo-China, and Pacific regions. Extreme fluxes appeared often in the early morning and persisted for several hours during the maximum and recovery phase of geomagnetic storms. We analyzed nine storm time events when extreme electron fluxes first appeared in the Eastern Hemisphere, then drifted further eastward toward the South-Atlantic Anomaly. Using the electron spectra, we estimated the possible ionization effect produced by quasi-trapped electrons in the topside ionosphere. The estimated ionization was found to be large enough to satisfy observed storm time increases in the ionospheric total electron content (TEC) determined for the same spatial and temporal ranges from global ionospheric maps. Additionally, extreme fluxes of quasi-trapped electrons were accompanied by the significant elevation of the low-latitude F-layer obtained from COSMIC/FORMOSAT-3 radio occultation measurements. We suggest that the storm time ExB drift of energetic electrons from the inner radiation belt is an important driver of positive ionospheric storms within low-latitude and equatorial regions.

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Altitude distribution analysis of electron fluxes at L=1.2–1.8

Cited by 14 publications

References 7 publications

Discovery of a low-latitude ionospheric trough associated with the inner radiation belt

Discovery of a low-latitude ionospheric trough associated with the inner radiation belt

Spectral characteristics of electron fluxes at L<2 under the Radiation Belts

TEC evidence for near‐equatorial energy deposition by 30 keV electrons in the topside ionosphere

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