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Evidence of Unusually Strong Equatorial Ionization Anomaly at Three Local Time Sectors During the Mother's Day Geomagnetic Storm On 10–11 May 2024

Diptiranjan Rout et al · Wiley · 2025

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Author / responsible party
Diptiranjan Rout et al
Publisher
Wiley
Year
2025
ISSN
0094-8276
ISSN
0094-8276
Language
English
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Abstract This study uses multiple ground and satellite‐based measurements to investigate the extreme ionospheric response to the Mother's Day storm on May 10–11, 2024. Prompt penetration electric field caused a significant enhancement in the ionospheric vertical drift (∼ 95 m/s) and the equatorial electrojet strength (∼ 275 nT) over Jicamarca. These extreme eastward electric field perturbations, along with the large meridional wind, significantly altered the F‐region plasma fountain at different local times. The afternoon equatorial ionization anomaly (EIA) not only sustained for an exceptionally long duration (∼ 12 hr) but also expanded spatially over time. The separation between the two peaks of EIA crests exceeded ∼48° and ∼70° in the morning and evening sectors, respectively. This study shows, for the first time, that unusually strong EIA can not only develop at different local times but can also sustain for long duration under favorable conditions, which has implications for space weather applications.

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APA 7

al, D. R. E. (2025). Evidence of Unusually Strong Equatorial Ionization Anomaly at Three Local Time Sectors During the Mother's Day Geomagnetic Storm On 10–11 May 2024. https://doi.org/10.1029/2024GL111269

MLA

al, Diptiranjan Rout et. "Evidence of Unusually Strong Equatorial Ionization Anomaly at Three Local Time Sectors During the Mother's Day Geomagnetic Storm On 10–11 May 2024." 2025. https://doi.org/10.1029/2024GL111269.

Chicago

al, Diptiranjan Rout et. 2025. "Evidence of Unusually Strong Equatorial Ionization Anomaly at Three Local Time Sectors During the Mother's Day Geomagnetic Storm On 10–11 May 2024.". https://doi.org/10.1029/2024GL111269.

Harvard

al, D. R. E. 2025, Evidence of Unusually Strong Equatorial Ionization Anomaly at Three Local Time Sectors During the Mother's Day Geomagnetic Storm On 10–11 May 2024, Wiley, available at: https://doi.org/10.1029/2024GL111269 [Accessed 8 Aug. 2026].

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Title
Evidence of Unusually Strong Equatorial Ionization Anomaly at Three Local Time Sectors During the Mother's Day Geomagnetic Storm On 10–11 May 2024
Author / contributors
Diptiranjan Rout et al
Publisher
Wiley
Publication year
2025
ISSN
0094-8276
ISSN
0094-8276
Language
English

Subjects

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space weather; mother's day storm; plasma fountain; penetration electric field; overshielding electric field; disturbance dynamo electric field
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