Low-Latitude Ionospheric Responses and Coupling to the February 2014 Multiphase Geomagnetic Storm from GNSS, Magnetometers, and Space Weather Data

Calabia, Andrés; Anoruo, Chukwuma Moses; Shah, Munawar; Mazaudier, Christine; Yasyukevich, Yury; Owolabi, Charles; Jin, Shuanggen

doi:10.3390/atmos13040518

Cited by 14 publications

(10 citation statements)

References 75 publications

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“…Anomalous ionospheric variations were observed from plasma content variability during the geomagnetic storms of 6 April and 29 May 2010 [1,2]. Several studies have investigated the ionospheric variations during storms at different latitudes from satellite data [3][4][5]. Seasonal variations and hemispheric ionospheric irregularities are also present during geomagnetic storms [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Ionospheric–Thermospheric Responses to Geomagnetic Storms from Multi-Instrument Space Weather Data

et al. 2023

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We analyze vertical total electron content (vTEC) variations from the Global Navigation Satellite System (GNSS) at different latitudes in different continents of the world during the geomagnetic storms of June 2015, August 2018, and November 2021. The resulting ionospheric perturbations at the low and mid-latitudes are investigated in terms of the prompt penetration electric field (PPEF), the equatorial electrojet (EEJ), and the magnetic H component from INTERMAGNET stations near the equator. East and Southeast Asia, Russia, and Oceania exhibited positive vTEC disturbances, while South American stations showed negative vTEC disturbances during all the storms. We also analyzed the vTEC from the Swarm satellites and found similar results to the retrieved vTEC data during the June 2015 and August 2018 storms. Moreover, we observed that ionospheric plasma tended to increase rapidly during the local afternoon in the main phase of the storms and has the opposite behavior at nighttime. The equatorial ionization anomaly (EIA) crest expansion to higher latitudes is driven by PPEF during daytime at the main and recovery phases of the storms. The magnetic H component exhibits longitudinal behavior along with the EEJ enhancement near the magnetic equator.

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Section: Introductionmentioning

confidence: 99%

Ionospheric–Thermospheric Responses to Geomagnetic Storms from Multi-Instrument Space Weather Data

et al. 2023

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“…During storms, solar wind/magnetosphere coupling leads to increased Joule heating. This results perturbations in the composition, temperature, density, and winds of the upper atmosphere [27][28][29] that influence aerospace systems and associated human technologies. Examples of activities directly impacted are radio wave propagation, sending signals between satellites and Earth, control of communication and navigation systems, etc.…”

Section: Introductionmentioning

confidence: 99%

“…However, the complex processes that occur in the upper atmosphere during geomagnetic storms make accurate modeling difficult. Existing models can only provide monthly averages of actual variability, especially during periods of magnetic quiet [27]. Geomagnetic phenomena's complexity makes modeling hard during disturbed period complex, hence interest in studying response of Koudougou station' TEC data during disturbed periods in general and particularly during moderate geomagnetic storms.…”

Section: Introductionmentioning

confidence: 99%

Koudougou (Burkina Faso, Africa), GPS-TEC Response to Recurrent Geomagnetic Storms during Solar Cycle 24 Declining Phase

Sawadogo

Gnabahou

Sandwidi

et al. 2023

International Journal of Geophysics

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In this paper, we presented the effect of moderate geomagnetic storms on the TEC variation at the Koudougou station (Geo Lat 12° 15 ′ N; Geo Long: -2° 20 ′ E) in Burkina Faso (Africa) during the descending phase of solar cycle 24. For this purpose, four moderate geomagnetic storms without storm sudden commencement (SSC) or sudden impulse (SI) that occurred on May 13, 2015 (Dst: -76 nT), June 08, 2015 (Dst: -73 nT), September 11, 2015 (Dst: -80 nT), and May 08-09, 2016 (Dst: -88nT), were considered. These moderate storms were found to be associated with transients induced by fast solar winds. At the Koudougou station, TEC variation shows a positive response to the different moderate geomagnetic storms studied, with increases of order of 2-21 TECU around 1300-1500 UT except for September 11, 2015, TEC variation which shows sometimes negative responses at a few hours (mainly at night). TEC increases observed are a function of geomagnetic parameter (magnitude and polarity) variation. Storm-induced electric field and neutral winds are the main drivers of TEC changes observed during the selected geomagnetic storms. In addition, it was found that the TEC peak on storm day behaves differently compared to the days before and after the storm depending on whether Dst is positive or negative before southward inversion. Indeed, a TEC small peak relative to the days before and after the storm is observed when Dst is negative before southward inversion, and a larger peak occurs in the opposite case. The reasons for these differences are not investigated in this paper.

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“…The magnitude and occurrence of positive/negative ionospheric disturbances due to geomagnetic storms depend on latitude, local time, and other factors, including solar variability (Buonsanto, 1999;N M Pedatella, 2009;A Calabia, 2021). The storm induced ionospheric disturbances are due to the effect of the prompt penetration electric fields (PPEFs) and disturbance dynamo electric fields (DDEFs) (Blanc & Richmond, 1980).…”

Section: Introductionmentioning

confidence: 99%

Longitudinal dependence of ionospheric irregularities to maximum ring current and PPEF sensed by GNSS and magnetometers during the storm of 4 November 2021

Imtiaz¹,

Feyissa

Calabia

et al. 2023

Preprint

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We employ multi-instrumental data to investigate the behavior of equatorial and low latitude ionosphere during the geomagnetic storm of November 3-6, 2021. We used TEC data obtained from GPS receiver stations located in the equatorial and low-latitudes of the Asian, African, and American sectors. It is found that the storm-time ionization level varies significantly in the trough and crest of EIA region over the three longitudes. ROTI is used to estimate the occurrence of ionospheric plasma irregularities during the storm. Usually, the main phase of the geomagnetic storm triggers the equatorial plasma irregularities and the recovery phase suppresses the occurrence of them. Here, we observed inhibition of the plasma irregularities over the three sectors during the main phase of the storm. We suspect this may be due to the injection of the PEFs which occur between local midnight and around noon during the main phase. The PEFs restrict the diffusion of plasma and therefore, suppress the occurrence of plasma irregularities during the main phase. During the recovery phase, moderate ionospheric irregularities occurred at local midnight in the American sector. In the African sector, the occurrence of weak irregularities can be seen before midnight on November 5 and 6. However, the Asian sector does not exhibit noticeable ionospheric irregularities during the storm. We conclude that the longitudinal variation in the development of ionospheric irregularities can be influenced by factors such as local time occurrence of maximum ring current, PPEF, disturbance wind dynamo electric field, and shielding electric field.

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Low-Latitude Ionospheric Responses and Coupling to the February 2014 Multiphase Geomagnetic Storm from GNSS, Magnetometers, and Space Weather Data

Cited by 14 publications

References 75 publications

Ionospheric–Thermospheric Responses to Geomagnetic Storms from Multi-Instrument Space Weather Data

Ionospheric–Thermospheric Responses to Geomagnetic Storms from Multi-Instrument Space Weather Data

Koudougou (Burkina Faso, Africa), GPS-TEC Response to Recurrent Geomagnetic Storms during Solar Cycle 24 Declining Phase

Longitudinal dependence of ionospheric irregularities to maximum ring current and PPEF sensed by GNSS and magnetometers during the storm of 4 November 2021

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