Swarm satellite observations of the effect of prompt penetration electric fields (PPEFs) on plasma density around noon and midnight side of low latitudes during the 07–08 september 2017 geomagnetic storm

Timoçin, Erdinç

doi:10.1016/j.asr.2021.11.027

Cited by 9 publications

(4 citation statements)

References 19 publications

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“…This result, as well as the increases in storm-time density, is consistent with earlier findings by Huang et al (2005) who observed the F-region peak rising by ~ 80 km during storm time. Timoçin (2022) likewise reported on density changes observed by Swarm during storm times, which were interpreted as being due to PPEF influence.…”

Section: Discussionmentioning

confidence: 80%

“…Interestingly, the nightside NmF2 storm-time increases observed by ionosondes are less clear than for the dayside. It is known that both positive and negative F-layer storms exist (e.g., Rishbeth et al 1998) and that mainand recovery-phase density dynamics can be opposite on opposing MLT sectors, i.e., a main-phase density increase at noon can correspond to a main-phase density decrease at midnight (Timoçin 2022). From the dataset selected for this study it is not possible to tell whether the observed evidence of storm-time density increases points to the fact that there are more positive storms than negative storms, or whether the positive storm density increases are simply larger (or more often) for this particular dataset.…”

Section: Discussionmentioning

confidence: 99%

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Light ion dynamics in the topside ionosphere and plasmasphere during geomagnetic storms

Pakhotin

Burchill

Förster

et al. 2023

Earth Planets Space

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Storm-time topside ionosphere plasma composition, especially the light ion fraction, is an important parameter which controls magnetosphere–ionosphere coupling, plays a part in the growth of local instabilities, and provides information about the ring current, ion upflow, movement of ionization and other important physical processes and parameters. Ion composition is difficult to estimate on fine scales as empirical models tend to be parametrized by fixed inputs, ignoring the role of memory in plasma, and to preferentially capture large scales, while ground radars have limited coverage. In particular, ionospheric composition measurements at mid-latitude are lacking. Here we show, using the new Swarm SLIDEM effective ion mass measurement, a superposed epoch analysis of storm-time dayside and nightside effective ion mass changes, demonstrating the extent and timescales of motion of the [O+]/[H+] transition height with the main phase of geomagnetic storms, as well as directly observing evidence for the latitude dependence of these dynamics. Graphical Abstract

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Section: Discussionmentioning

confidence: 80%

Section: Discussionmentioning

confidence: 99%

Light ion dynamics in the topside ionosphere and plasmasphere during geomagnetic storms

Pakhotin

Burchill

Förster

et al. 2023

Earth Planets Space

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“…It’s observed that Bz sharply turns northward earlier at around 0800 UT, therefore this is the initiation of storm recovery effects (Tsurutani & Gonzalez, 1997). Previous studies have shown that the northward Bz results in overshielding effects that preferably trigger substorms in the recovery phase (Timoçin, 2022; Wei et al., 2011).…”

Section: Geomagnetic Storm Descriptionmentioning

confidence: 99%

The Ionospheric Dynamics of the African Sector Responding to a Severe Geomagnetic Storm; the Storm of 3–5 November 2021

Rukundo

2023

Space Weather

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A geomagnetic storm is a disturbance on the Earth's magnetic field resulting from enhanced energy transfer from interplanetary space to the Earth's environment through the magnetosphere. The cause of geomagnetic storms is variation in the solar wind parameters, that is enhancement in solar wind speed and solar wind particles that increase solar wind pressure, and at least >3 hr sustained southward interplanetary magnetic field (IMF) on the day side magnetosphere (Gonzalez et al., 1994;Kumar & Kumar, 2019). The major solar driver of this disturbance is the coronal mass ejections (CMEs) embedded with large plasma emissions from the sun, taking several hours or days to reach the Earth's atmosphere. It should be noted that other sun's emissions like high solar wind speed from coronal holes, and corotating interaction regions also contribute to geomagnetic storms (Richardson, 2018;Richardson et al., 2006). The geomagnetic storm effects induce ionospheric disturbances characterized

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“…A prompt penetrating electric field (PPEF) during geomagnetic storms is also commonly studied [29] , [30] , [31] . It is an electric field that rapidly penetrates the Earth's ionosphere during a geomagnetic storm.…”

Section: Introductionmentioning

confidence: 99%

TEC disturbances caused by CME-triggered geomagnetic storm of September 6–9, 2017

Uga,

Gautam,

Seba

2024

Heliyon

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Swarm satellite observations of the effect of prompt penetration electric fields (PPEFs) on plasma density around noon and midnight side of low latitudes during the 07–08 september 2017 geomagnetic storm

Cited by 9 publications

References 19 publications

Light ion dynamics in the topside ionosphere and plasmasphere during geomagnetic storms

Light ion dynamics in the topside ionosphere and plasmasphere during geomagnetic storms

The Ionospheric Dynamics of the African Sector Responding to a Severe Geomagnetic Storm; the Storm of 3–5 November 2021

TEC disturbances caused by CME-triggered geomagnetic storm of September 6–9, 2017

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