1. Department of Geology, University of Maiduguri, Maiduguri, Nigeria
2. Department of Geography, University College London, London, UK
3. Département Dynamiques internes et de surface des continents, IRD, CNRS, Grenoble INP, IGE, Université Grenoble Alpes, Grenoble, France
4. Institut de Recherche Pour le Développement (IRD), Niamey, Niger
5. Institute for Risk and Disaster Reduction, University College London, London, UK
6. Department of Geography, University of Sussex, Brighton, UK
7. Département de Géologie, Faculté des Sciences et Techniques, Université Abdou Moumouni de Niamey, Niamey, Niger
8. Faculty of Science, University of Ngaoundéré, Ngaoundéré, Cameroon