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Effects of geomagnetic storm on equatorial ionization during 27 February-1 March, 2014
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  • Omar Hammou Ali,
  • Idahwati Binti Sarudin,
  • Joanna Rupiewicz,
  • Manuel Bravo,
  • Lekso Toriashvili,
  • Xingxin Sun
Institute of Radio Physics and Electronics, University of Calcutta

Corresponding Author:[email protected]

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Omar Hammou Ali
University of Sciences and Technology Houari Boumediene
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Idahwati Binti Sarudin
Universiti Kebangsaan Malaysia
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Joanna Rupiewicz
European Satellite Service Provider Service Provision Unit Mission
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Manuel Bravo
Universidad de Santiago de Chile Libertador General Bernardo O'Higgins
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Lekso Toriashvili
Ilia State University, Abastumani Astrophysical Observatory
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Xingxin Sun
China Research Institute of Radiowave Propagation
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The paper inspects the effects of a G2 class geomagnetic storm that occurred during 27 February- 1 March, 2014 on the equatorial ionization. This storm is observed following a Coronal Mass Ejection (CME) from a sunspot AR1967 on 26 February. An enhancement of solar wind speed is observed on 27 February, 2014 (483 km/sec). The maximum southward component of Interplanetary Magnetic Field (IMF) is observed around 21 UT of 27 February (12 nT). This interconnects with Earth’s magnetic field and develops the main phase of a geomagnetic storm on the same day. The storm continues through 28 February and quiet-time ionospheric condition is recovered on 1 March. The effects of the storm on equatorial ionization is observed at Brasilia (15.95°S, 47.88°W geographic; 9.40°N, 21.13°E geomagnetic), Addis Ababa (9.04°N, 38.77°E geographic; 0.18°N, 110.47°E geomagnetic) and Colombo (6.89°N, 79.87°E geographic; 1.57°S, 151.57°E geomagnetic). An enhancement of TEC is observed during main phase of the geomagnetic storm at these stations. Increment in diurnal peak is observed on 28 February (14 TECU at 10 UT at Addis Ababa) while a decrement of diurnal peak TEC is observed during the recovery phase of the storm (15 TECU at 10 UT at Addis Ababa). Post-sunset ionospheric scintillation is inhibited at Brasilia on 28 February.