Department of Earth and Planetary Sciences, Washington University in St. Louis Campus Box 1169, EPSc Room 110 1 Brookings Drive, St. Louis, MO 63130-4899 United States
Department of Earth and Planetary Sciences, Washington University in St. Louis Campus Box 1169, EPSc Room 110 1 Brookings Drive, St. Louis, MO 63130-4899 United States
Department of Earth and Planetary Sciences, Washington University in St. Louis Campus Box 1169, EPSc Room 110 1 Brookings Drive, St. Louis, MO 63130-4899 United States
Department of Earth and Planetary Sciences, Washington University in St. Louis Campus Box 1169, EPSc Room 110 1 Brookings Drive, St. Louis, MO 63130-4899 United States
Department of Earth and Planetary Sciences, Washington University in St. Louis Campus Box 1169, EPSc Room 110 1 Brookings Drive, St. Louis, MO 63130-4899 United States
Department of Geosciences, Pennsylvania State University 446 Deike Building, University Park, PA 16802 United States
Department of Geosciences, Pennsylvania State University 446 Deike Building, University Park, PA 16802 United States
The Institute for Geological and Mining Research (IRGM), P.O. Box 4110, Yaounde, 00000 Cameroon
Institute of Mining and Geological Research (IRGM), Antenna for Geophysical and Volcanological Research (ARGV) Ekona P.O. Box 370, Buea, 00000 Cameroon
Department of Physics, Faculty of Science University of Yaounde I P.O. Box 812, Yaounde, 00000 Cameroon
Department of Physics, Faculty of Science University of Yaounde I P.O. Box 812, Yaounde, 00000 Cameroon