Latitudinal variation of ionospheric currents in Southeast Asian sector

Nurul Shazana Abdul Hamid, Wan Nur Izzaty Ismail, Akimasa Yoshikawa

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The equatorial electrojet (EEJ) is a current system caused by the enhanced ionospheric conductivity near the dayside magnetic dip equator. In this study, we attempt to obtain the latitudinal profile of Sq and total current component (EEJ+Sq) and consequently attain the EEJ latitudinal variation. Analysis is carried on using magnetic data recorded at six stations in Southeast Asian sector. The data used are equatorial electrojet index, EUEL, which were calculated from geomagnetic northward, H, component on geomagnetically quiet days. We further compared latitudinal profile of Sq and total current during solar minimum (2008) and solar maximum (2014) in order to study their solar cycle dependence. Furthermore, we examined the EEJ circuit for both solar activity period. Result shows that as the EEJ strength increase with solar activity, it contribute to higher increase in total current during 2014, and consequently contribute to significant difference in the total current latitudinal profile during 2008 and 2014. On the other hand, the EEJ latitudinal variation illustrates the current circuit where the reverse current was observed to start on the flanks of dip equator at about 5° and terminate at less than 10° latitude in both hemispheres.

Original languageEnglish
Pages (from-to)1444-1447
Number of pages4
JournalAdvanced Science Letters
Volume23
Issue number2
DOIs
Publication statusPublished - 1 Feb 2017

Fingerprint

Solar Activity
electrojet
Sector
Networks (circuits)
Equator
solar activity
dip
Hemisphere
Terminate
Conductivity
Reverse
solar cycle
Cycle
conductivity
Profile

Keywords

  • EEJ circuit
  • Equatorial electrojet
  • Latitudinal profile
  • Solar cycle dependence
  • Sq current

ASJC Scopus subject areas

  • Computer Science(all)
  • Health(social science)
  • Mathematics(all)
  • Education
  • Environmental Science(all)
  • Engineering(all)
  • Energy(all)

Cite this

Latitudinal variation of ionospheric currents in Southeast Asian sector. / Abdul Hamid, Nurul Shazana; Ismail, Wan Nur Izzaty; Yoshikawa, Akimasa.

In: Advanced Science Letters, Vol. 23, No. 2, 01.02.2017, p. 1444-1447.

Research output: Contribution to journalArticle

Abdul Hamid, Nurul Shazana ; Ismail, Wan Nur Izzaty ; Yoshikawa, Akimasa. / Latitudinal variation of ionospheric currents in Southeast Asian sector. In: Advanced Science Letters. 2017 ; Vol. 23, No. 2. pp. 1444-1447.
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