Perubahan Sistem Arus Ionosfera di Kawasan Asia Tenggara semasa Ribut Geomagnet pada Fasa Suria Minimum

Translated title of the contribution: Changes in ionospheric currents system at southeast Asia region during geomagnetic storm in solar's minimum phase

Nurul Shazana Abdul Hamid, Viksuthorn Ai Wen, Nur Izzati Mohd Rosli, Akimasa Yoshikawa

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Equatorial ionospheric current system consists of equatorial electrojet (EEJ) and solar quiet (Sq). EEJ current is a ribbon of current flowing eastwards along the dip equator region. On the other hand, Sq current is a loop of current that flows at the Earth's northern and southern hemispheres in different directions. This study is focusing on analysing the effects of a solar event on the latitudinal profile of the current system, specifically in Southeast Asian region. Data used in this study are geomagnetic data from five magnetometer stations in MAGDAS network which are Muntinlupa (MUT), Cebu (CEB), Davao (DAV), Manado (MND) and Pare Pare (PRP). The EEJ current intensity is known to be highest around noon time between 1000 and 1100 LT during solar minimum and thus this study analyses the current system from 1000 to 1400 LT. The analysis showed that the geomagnetic storm occurred on 23 April 2008, which is caused by coronal mass ejection (CME), gives rises to the currents on that day. This increment is clearly observed on the currents at the southern hemisphere stations, which are MND and PRP. Our analysis also found that this geomagnetic storm gives increment to the current at the non-peak time. Apart from that, the current profile on this day is compared with the current profile from a quiet day on 21 April 2008.

Translated title of the contributionChanges in ionospheric currents system at southeast Asia region during geomagnetic storm in solar's minimum phase
Original languageMalay
Pages (from-to)1923-1929
Number of pages7
JournalSains Malaysiana
Volume47
Issue number8
DOIs
Publication statusPublished - Aug 2018

All Science Journal Classification (ASJC) codes

  • General

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