Elizabeth A Silber, Brown University, Department of Earth, Environmental and Planetary Sciences, Providence, RI, United States; AstrumPrime Space Research Inc., Dartmouth, NS, Canada, Maria Gritsevich, University of Helsinki, Helsinki, Finland; Ural Federal University, Institute of Physics and Technology, Yekaterinburg, Russia, Peter Butka, Technical University of Kosice, Department of Cybernetics and Artificial Intelligence, Faculty of Electrical Engineering and Informatics, Kosice, Slovenia and Reynold E Silber, Yale University, Geology and Geophysics, New Haven, United States