October 2023

Hydrogeological assessment of groundwater resources within Isuikwuato and environ South Eastern Nigeria: Agenda for food agriculture and clean water policies

Groundwater resources of the Isuikwuato area, south eastern Nigeria, have been evaluated using integrated geophysical and hydrogeochemical techniques, to determine the quality and usability of the groundwater for domestic and agricultural purposes. Twenty Vertical Electrical Soundings (VES) physicochemical analyses were done. Depth to aquiferous unit varies from 38 to 148 m. The hydrogeochemical characterization shows...

Author(s): Joshua Chima CHIZOBA, Ayatu Ojonugwa USMAN, Chukwudi Chris EZEH, Ifeanyi Augustine CHINWUKO, George-Best AZUOKO, Obinna Chigoziem AKAKURU and Kenneth Obinna IHEME  

November 2023

foF2 diurnal variation at Dakar station during the period of geomagnetic shock of variable duration over solar cycle 21 and 22: Prediction with IRI 2016

This work concerns the comparative study of the diurnal variation of the critical frequency of the F2 layer (foF2) between experimental data from the Dakar station and those of the IRI 2016 model through its URSI. The comparison was conducted during solar cycles 21 and 22, across different phases, and on various days of geomagnetic shock activity. The results indicate that during solar minimum, the graphs of the...

Author(s): Ali Mahamat Nour, Douzane Gouara, Sibri Alphonse Sandwidi and Frédéric Ouattara

November 2023

Contribution of solar quiet (Sq) daily current variations to the deep earth conductivity within the Southern African Region

This work focuses on determining the source current systems by applying the method of spherical harmonic analysis (SHA) to geomagnetic field data obtained from ground measurements. The objectives are to establish the mantle conductivity-depth profile and to compare the results of the profiles from four stations with other research findings. The study utilizes magnetometer data obtained for the year 2011 from geomagnetic...

Author(s): Ngozi Agatha Okwesili, Francisca Nneka Okeke and Igwe Emmanuel Awucha  

December 2023

Variability of the electric field of magnetospheric convection in recurrent activity during the solar cycle 24

This paper employs a statistical approach to investigate the diurnal variability of the magnetospheric convective electric field (MCEF) during recurrent activity, considering the phases of solar cycle 24. This study reveals that the magnetosphere exhibits greater dynamism during the maximum and descending phases on recurrent days. The diurnal variability of the MCEF on days of recurrent geomagnetic activity indicates...

Author(s): Dama Alfred Stéphane, Kaboré Salfo, Sandwidi Sibri Alphonse and Ouattara Frédéric