Andrew Prata, Barcelona Supercomputing Center, Barcelona, Spain, Arnau Folch, Fred J. Prata, AIRES Pty Ltd, Mt Eliza, Victoria, Australia, Riccardo Biondi, University of Padova, Padova, Italy, Hugues Brenot, Royal Belgian Institute for Space Aeronomy, Brussels, Belgium, Corrado Cimarelli, Ludwig Maximilians University of Munich, Earth and Environmental Sciences, Munich, Germany, Stefano Corradini, National Institute of Geophysics and Volcanology, Rome, Italy, Jeff Lapierre, Earth Networks Inc., Germantown, United States and Antonio Costa, Istituto Nazionale di Geofisica e Vulcanologia, Sezione Bologna, Bologna, Italy