1. Department of Petroleum and Gas Exploration, Faculty of Mines and Petroleum Industries, University of Maroua, Cameroon
2. Department of Renewable Energy, National Advanced Polytechnic School of Maroua, University of Maroua, Cameroon
3. Department of Materials Processing, Architecture and Habitat, National Advanced Polytechnic School of Maroua, University of Maroua, Cameroon
4. Geophysics Laboratory, Department of Physics, Faculty of Science and Mathematics, Diponegoro University, Indonesia