Manifestations of Strong IMF‐By on the Equatorial Ionospheric Electrodynamics During 10 May 2024 Geomagnetic Storm
Abstract Understanding the effects of east‐west component of interplanetary magnetic field (IMF‐By) on the equatorial ionospheric electrodynamics is challenging due to the complex response caused by the simultaneous occurrence of multiple mechanisms during disturbed times. The extreme geomagnetic st...
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Wiley
2024-12-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2024GL112569 |
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| author | Geeta Vichare Mala S. Bagiya |
| author_facet | Geeta Vichare Mala S. Bagiya |
| author_sort | Geeta Vichare |
| collection | DOAJ |
| description | Abstract Understanding the effects of east‐west component of interplanetary magnetic field (IMF‐By) on the equatorial ionospheric electrodynamics is challenging due to the complex response caused by the simultaneous occurrence of multiple mechanisms during disturbed times. The extreme geomagnetic storm on 10 May 2024 caused by multiple‐ICME interactions accompanied with unprecedented IMF‐By magnitudes and its polarity, changed from west to east by 130 nT during northward IMF‐Bz turning. The ground ionosonde observations of h’F from near‐equatorial locations, along with the latitudinal profiles of plasma densities from Swarm satellites reveal the first observational evidence of the impact of strong IMF‐By near the dusk‐terminator (17–19.5 LT), causing strong dawn‐to‐dusk ionospheric electric fields during northward IMF‐Bz. This electric field produces large uplift of the ionospheric plasma near equator and subsequent super‐fountain effect near the dusk. The combined effect of increased IMF‐By amplitudes and viscous terms might have resulted into the enhanced coupling of solar wind with the magnetosphere. |
| format | Article |
| id | doaj-art-ba5c394b68944146a8fd4a152cf86fdb |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-ba5c394b68944146a8fd4a152cf86fdb2025-08-20T02:06:01ZengWileyGeophysical Research Letters0094-82761944-80072024-12-015123n/an/a10.1029/2024GL112569Manifestations of Strong IMF‐By on the Equatorial Ionospheric Electrodynamics During 10 May 2024 Geomagnetic StormGeeta Vichare0Mala S. Bagiya1Indian Institute of Geomagnetism Navi Mumbai IndiaIndian Institute of Geomagnetism Navi Mumbai IndiaAbstract Understanding the effects of east‐west component of interplanetary magnetic field (IMF‐By) on the equatorial ionospheric electrodynamics is challenging due to the complex response caused by the simultaneous occurrence of multiple mechanisms during disturbed times. The extreme geomagnetic storm on 10 May 2024 caused by multiple‐ICME interactions accompanied with unprecedented IMF‐By magnitudes and its polarity, changed from west to east by 130 nT during northward IMF‐Bz turning. The ground ionosonde observations of h’F from near‐equatorial locations, along with the latitudinal profiles of plasma densities from Swarm satellites reveal the first observational evidence of the impact of strong IMF‐By near the dusk‐terminator (17–19.5 LT), causing strong dawn‐to‐dusk ionospheric electric fields during northward IMF‐Bz. This electric field produces large uplift of the ionospheric plasma near equator and subsequent super‐fountain effect near the dusk. The combined effect of increased IMF‐By amplitudes and viscous terms might have resulted into the enhanced coupling of solar wind with the magnetosphere.https://doi.org/10.1029/2024GL112569IMF‐by effectequatorial ionosphereextreme IMF conditionsionospheric electrodynamics |
| spellingShingle | Geeta Vichare Mala S. Bagiya Manifestations of Strong IMF‐By on the Equatorial Ionospheric Electrodynamics During 10 May 2024 Geomagnetic Storm Geophysical Research Letters IMF‐by effect equatorial ionosphere extreme IMF conditions ionospheric electrodynamics |
| title | Manifestations of Strong IMF‐By on the Equatorial Ionospheric Electrodynamics During 10 May 2024 Geomagnetic Storm |
| title_full | Manifestations of Strong IMF‐By on the Equatorial Ionospheric Electrodynamics During 10 May 2024 Geomagnetic Storm |
| title_fullStr | Manifestations of Strong IMF‐By on the Equatorial Ionospheric Electrodynamics During 10 May 2024 Geomagnetic Storm |
| title_full_unstemmed | Manifestations of Strong IMF‐By on the Equatorial Ionospheric Electrodynamics During 10 May 2024 Geomagnetic Storm |
| title_short | Manifestations of Strong IMF‐By on the Equatorial Ionospheric Electrodynamics During 10 May 2024 Geomagnetic Storm |
| title_sort | manifestations of strong imf by on the equatorial ionospheric electrodynamics during 10 may 2024 geomagnetic storm |
| topic | IMF‐by effect equatorial ionosphere extreme IMF conditions ionospheric electrodynamics |
| url | https://doi.org/10.1029/2024GL112569 |
| work_keys_str_mv | AT geetavichare manifestationsofstrongimfbyontheequatorialionosphericelectrodynamicsduring10may2024geomagneticstorm AT malasbagiya manifestationsofstrongimfbyontheequatorialionosphericelectrodynamicsduring10may2024geomagneticstorm |