Does the South Atlantic Anomaly influence the ionospheric Sq current system? Inferences from analysis of ground-based magnetic data

Koch, Stephan; Kuvshinov, Alexey

doi:10.1186/s40623-014-0172-0

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…Space radiation is a very important factor affecting both humans and electronic systems (Konradi et al, 1994). The trapped radiation environment, consisting of large amounts of energetic charged particles, can be potentially harmful to human beings and space vehicles immerged in it (Qin et al, 2014).…”

Section: Review Of the Saa And Power Spectrum Analysismentioning

confidence: 99%

Characterization of the South Atlantic Anomaly

Nasuddin

Abdullah

Hamid

2019

Nonlin. Processes Geophys.

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Abstract. This research intends to characterize the South Atlantic Anomaly (SAA) by applying the power spectrum analysis approach. The motivation to study the SAA region is due to its nature. A comparison was made between the stations in the SAA region and outside the SAA region during the geomagnetic storm occurrence (active period) and the normal period where no geomagnetic storm occurred. The horizontal component of the data of the Earth's magnetic field for the occurrence of the active period was taken on 11 March 2011 while for the normal period it was taken on 3 February 2011. The data sample rate used is 1 min. The outcome of the research revealed that the SAA region had a tendency to be persistent during both periods. It can be said that the region experiences these characteristics because of the Earth's magnetic field strength. Through the research, it is found that as the Earth's magnetic field increases, it is likely to show an antipersistent value. This is found in the high-latitude region. The lower the Earth's magnetic field, the more it shows the persistent value as in the middle latitude region. In the region where the Earth's magnetic field is very low like the SAA region it shows a tendency to be persistent.

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Section: Review Of the Saa And Power Spectrum Analysismentioning

confidence: 99%

Characterization of the South Atlantic Anomaly

Nasuddin

Abdullah

Hamid

2019

Nonlin. Processes Geophys.

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“…In addition to variations over time, the geomagnetic field also possess strong spatial inhomogeneities (e.g., [92]; 109). In particular, and perhaps best known, the region of reduced field strength known as the South Atlantic Anomaly (e.g., [93]; 108 [94]) allows particles to penetrate deeper into the atmosphere due to the lower mirror altitude, and can locally modify the ionosphere (e.g., [93,95,96]). More relevant for ionospheric outflow is the magnetic field strength in the polar cap regions [97].…”

Section: The Impact Of Geomagnetic Field Strengthmentioning

confidence: 99%

High-Latitude Cold Ion Outflow Inferred From the Cluster Wake Observations in the Magnetotail Lobes and the Polar Cap Region

André

Eriksson

et al. 2021

Front. Phys.

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Cold ions with low (a few eV) thermal energies and also often low bulk drift energies, dominate the ion population in the Earth’s magnetosphere. These ions mainly originate from the ionosphere. Here we concentrate on cold ions in the high latitude polar regions, where magnetic field lines are open and connected to the magnetotail. Outflow from the ionosphere can modify the dynamics of the magnetosphere. In-situ observations of low energy ions are challenging. In the low-density polar regions the equivalent spacecraft potential is often large compared to cold ion energies and the ions cannot reach the spacecraft. Rather, a supersonic ion flow creates an enhanced wake. The local electric field associated with this wake can be used to detect the drifting cold ions, and this wake technique can be used for statistical studies. In this paper, we review some of the key results obtained from this technique. These results help us to understand how cold ionospheric outflow varies with various conditions of solar activities and the Earth’s intrinsic magnetic field.

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“…The SAA is of great interest to the scientific community as well as to the public because high-intensity solar corpuscular radiation can penetrate the Earth's orbit in the SAA region due to the weak main magnetic field (Koch and Kuvshinov, 2015). Knowledge of the radiation fields specific to the SAA is of great importance for the radiation safety of cosmonauts during a long orbital flight (Benghin et al, 1992).…”

Section: The South Atlantic Anomalymentioning

confidence: 99%

South Atlantic Anomalyduring ascending and maximum phase of solar cycle 24

Nasuddin

Abdullah

Hamid

2020

Preprint

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Abstract. For this research, four regions have been studied which are the South Atlantic Anomaly (SAA) region, low latitude region, middle latitude region and high latitude region. The active period which is the period when the geomagnetic storm occur chosen to be analyzed is on 6 August 2011 and 12 April 2014 and the normal period, a period when no geomagnetic storm happen is on 24 July 2011 and 14 May 2014. Year 2011 is chosen to be analyze in order to study the SAA region during the ascending phase of the solar cycle 24 and in year 2014, where the occurrence of the maximum phase of solar cycle 24 occur. The research is carried since there is no clear characterization of the SAA during ascending as well as maximum phase based on power spectrum analysis method. The Earth's magnetic field component chosen to be analyzed is the horizontal intensity (H) due to its sensitiveness regarding geomagnetic activeness. From the research conducted, the result reveal SAA region has a tendency to be persistent during both period compare to other region during both phases. Other regions in the research experience a tendency to be persistent and antipersistent.

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Does the South Atlantic Anomaly influence the ionospheric Sq current system? Inferences from analysis of ground-based magnetic data

Cited by 5 publications

References 18 publications

Characterization of the South Atlantic Anomaly

Characterization of the South Atlantic Anomaly

High-Latitude Cold Ion Outflow Inferred From the Cluster Wake Observations in the Magnetotail Lobes and the Polar Cap Region

South Atlantic Anomalyduring ascending and maximum phase of solar cycle 24

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