Latitudinal ionospheric Responses to Full Halo CMEs Induced Geomagnetic Storm


  • Dominic Chukwuebuka Obiegbuna University of Nigeria, Nsukka, Nigeria
  • Francisca Nneka Okeke University of Nigeria, Nsukka, Enugu State, Nigeria
  • Kingsley Chukwudi Okpala University of Nigeria, Nsukka, Enugu State, Nigeria
  • Sivla William Tafon University of Nigeria, Nsukka, Enugu State, Nigeria
  • Orji Prince Orji University of Nigeria, Nsukka, Enugu State, Nigeria


Geomagnetic storm, Full Halo CMEs, High Latitude, Low latitude, Ionosphere, TEC


Communication in Physical Sciences, 2021, 7(4): 312-320

Authors: Dominic Chukwuebuka  Obiegbuna*, Francisca Nneka Okeke, Kingsley Chukwudi Okpala, Sivla William Tafon and Orji Prince Orji

Received: 11  November 2021/Accepted 04 December 2021

We have studied and compared the effects of full halo CMEs induced geomagnetic storms across the high, mid/equatorial and low latitude ionosphere around Ny Alesund, Norway, Irkutsk, Russia and Adis Ababa, Ethiopia. The total electron content (TEC) data obtained from the global positioning system (GPS) were used to examine the level of responses of ionospheric latitudes to full halo CMEs induced geomagnetic storms of June 23rd 2015. This study was carried out using dual frequency ground based GNSS observations at high latitude (NYAL: 78.56oN, 11.52oE), mid-latitude (IRKM: 52.13oN, 106.24oE) and low (Adis: 9.02oN, 38.44oE), ionospheric stations. The vertical TEC (VTEC) was extracted from Receiver Independent Exchange (RINEX) formatted GPS-TEC data using the GOPI Software developed by Seemala Gopi. The GOPI software is a GNSS-TEC analysis program that uses ephemeris data and differential code biases (DCBs) in estimating slant TEC (STEC) before its conversion to VTEC. The result showed positive ionospheric responses of the ionospheric latitudes on the storm day. The overall responses across the latitudes to the geomagnetic storm were generally positive for the high latitude and negative for mid/equatorial and low latitudes.


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Author Biographies

Dominic Chukwuebuka Obiegbuna, University of Nigeria, Nsukka, Nigeria

Department of Physics and Astronomy

Francisca Nneka Okeke , University of Nigeria, Nsukka, Enugu State, Nigeria

Department of Physics and Astronomy

Kingsley Chukwudi Okpala, University of Nigeria, Nsukka, Enugu State, Nigeria

Department of Physics and Astronomy

Sivla William Tafon, University of Nigeria, Nsukka, Enugu State, Nigeria

Department of Physics and Astronomy

Orji Prince Orji, University of Nigeria, Nsukka, Enugu State, Nigeria

Department of Physics and Astronomy


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