[1] Finnish Fireball Network, Helsinki, Finland
[2] Univ Helsinki, Dept Phys, FIN-00014 Helsinki, Finland
[3] Acad Sci Czech Republic, Inst Geol, Prague, Czech Republic
[4] Finnish Geospatial Res Inst, Masala, Finland
[5] Ural Fed Univ, Ekaterinburg, Russia
[6] Inst Space Sci CSIC IEEC, Barcelona, Spain
[7] Inst Met Phys RAS, Ekaterinburg, Russia
[8] Czech Geol Survey, Prague, Czech Republic
[9] Oxford Instruments NanoAnal, High Wycombe, Bucks, England
[10] Swiss Fed Inst Technol, Inst Geochem & Petr, Zurich, Switzerland
[11] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, Assergi, Italy
[12] Moscow State Univ Geodesy & Cartog, Moscow, Russia