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Nonlinear Processes in Geophysics An interactive open-access journal of the European Geosciences Union
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https://doi.org/10.5194/npg-2020-15
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/npg-2020-15
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 18 May 2020

Submitted as: research article | 18 May 2020

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This preprint is currently under review for the journal NPG.

South Atlantic Anomalyduring ascending and maximum phase of solar cycle 24

Khairul Afifi Nasuddin1, Mardina Abdullah1,2, and Nurul Shazana Abdul Hamid3 Khairul Afifi Nasuddin et al.
  • 1Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsaan Malaysia, Bangi, 43600, Malaysia
  • 2Space Science Center (ANGKASA), Institute of Climate Change, Universiti Kebangsaan Malaysia, Bangi, 43600, Malaysia
  • 3Department of Applied Physics, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, 43600, Malaysia

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.

Khairul Afifi Nasuddin et al.

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Khairul Afifi Nasuddin et al.

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Short summary
Research on South Atlantic Anomaly (SAA) is conducted during active and normal period in certain phase of solar cycle 24. The result reveal SAA region has a tendency to be persistent during both period compare to other regions during the phase studied. Other regions in the research experience a tendency to be persistent and antipersistent. Based on the observation, the Earth magnetic field strength and the year the solar cycle phase occur may have an influence on the characteristic of a region.
Research on South Atlantic Anomaly (SAA) is conducted during active and normal period in certain...
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