| Principal components of quiet time temporal variability of equatorial and low‐latitude geomagnetic fields A Bhattacharyya, KC Okpala Journal of Geophysical Research: Space Physics 120 (10), 8799-8809, 2015 | 18 | 2015 |
| On the mid-latitude ionospheric storm association with intense geomagnetic storms KC Okpala, CE Ogbonna Advances in Space Research 61 (7), 1858-1872, 2018 | 8 | 2018 |
| Investigation of diurnal and seasonal galactic cosmic ray variations on quiet days in two mid latitude stations KC Okpala, FN Okeke Astroparticle Physics 34 (12), 878-885, 2011 | 8 | 2011 |
| Diurnal and seasonal variations of the occurrence of ionospheric irregularities over Nigeria from GNSS data O Ikani, FN Okeke, KC Okpala, D Okoh, B Rabiu Frontiers in Astronomy and Space Sciences 10, 1125950, 2023 | 4 | 2023 |
| Variation of vertical total electron content (TEC) over West Africa during geomagnetic storms KC Okpala, EB Ugwu, OJ Attah, D Obiegbuna, RC Anamezie, F Egbunu Physical Science International Journal 24 (5), 52-63, 2020 | 4 | 2020 |
| A study on the effects of solar wind and interplanetary magnetic field on geo-magnetic H-component during geomagnetic storms SO Chiaha, OJ Ugonabo, KC Okpala Int. J. Phys. Sci 13, 230-234, 2018 | 4 | 2018 |
| Cosmic ray modulation in high and middle latitudes during solar cycles 22 and 23 KC Okpala, FN Okeke, AI Ugwuoke Canadian Journal of Physics 93 (1), 100-104, 2015 | 4 | 2015 |
| Geomagnetic solar flare effect in H, Y, and Z fields in the Northern Hemisphere FN Okeke, KC Okpala NJSR 1, 39-99, 2005 | 4 | 2005 |
| Irregularities in the African ionosphere associated with total electron content anomalies observed during high solar activity levels CM Anoruo, B Rabiu, D Okoh, FN Okeke, KC Okpala Frontiers in Astronomy and Space Sciences 9, 947473, 2022 | 3 | 2022 |
| Galactic cosmic ray variability at two neutron monitors: relation to Kp index KC Okpala Journal of Astrophysics 2015 (1), 961358, 2015 | 3 | 2015 |
| Variability of the daily cosmic ray count rates in the northern hemisphere K Okpala, F Okeke 40th COSPAR Scientific Assembly 40, D1. 3-54-14, 2014 | 3 | 2014 |
| Predictions of the arrival time of Coronal Mass Ejection (CME) and its contributions to major Geomagnetic storms FN Okeke, KC Okpala, V Akaogu Nig. J. Space Res 10, 217-230, 2011 | 3 | 2011 |
| Seasonal changes in H-component of quiet day geomagnetic field modulation of galactic cosmic rays KC Okpala, FN Okeke Nigerian Journal of Space Research 7, 86-94, 2010 | 3 | 2010 |
| Solar flare effects and storm sudden commencement even in Geomagnetic H, Y and Z fields at Euro-African observatories FN Okeke, KC Okpala Nigerian Journal of Physics 18 (1), 59-66, 2006 | 3 | 2006 |
| Investigation of effects of coronal mass ejections on ionospheric total electron content over Nsukka, South Eastern Nigeria EA Hanson, FN Okeke, K Okpala Annales Geophysicae Discussions 2019, 1-10, 2019 | 2 | 2019 |
| Latitudinal ionospheric responses to full halo CMEs induced geomagnetic storm DC Obiegbuna, FN Okeke, KC Okpala, SW Tafon, OP Orji Communication in Physical Sciences 7 (4), 2021 | 1 | 2021 |
| Seasonal variability of total electron content in low latitude region of West Africa OJ Ugonabo, GC Amanekwe, KC Okpala Publication of the Astronomical Society of Nigeria 5, 8-14, 2020 | 1 | 2020 |
| Variability of quiet-time diurnal amplitude and phase of cosmic ray count rates in the mid-and high latitudes O Ugochukwu, E Friday International Journal of Physical Sciences 12 (22), 295-307, 2017 | 1 | 2017 |
| Geomagnetic Storm Variation of Vertical Total Electron Content (VTEC) Over Some Euro-African Stations OJ Ugonabo, EBI Ugwu, KC Okpala, GC Amanekwe Physical Science International Journal 28 (1), 23-34, 2024 | | 2024 |
| Total Electron Content Variability in the African Ionosphere Observed during Ascending and Decaying Geomagnetic Storms CM Anoruo, FN Okeke, KC Okpala Geomagnetism and Aeronomy 63 (6), 839-853, 2023 | | 2023 |
