*Paul Prikryl^1,2, Takumi Tsukijihara³, Koki Iwao⁴, Donald B Muldrew⁵, Robert Bruntz⁶, Vojto Rušin⁷, Milan Rybanský⁸, Maroš Turna⁹, Pavel Štastný⁹, Vladimír Pastircák⁹ (1.Physics Department, University of New Brunswick, Fredericton, NB, Canada, 2.Geomagnetic Laboratory, Natural Resources Canada, Ottawa, ON, Canada, 3.Department of Earth and Planetary Sciences, Kyushu University, Fukuoka, Japan, 4.National College of Technology, Kumamoto College, Yatsushiro, Japan, 5.Emeritus, Communications Research Centre, Ottawa, ON, Canada, 6.Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA, 7.Astronomical Institute, Slovak Academy of Sciences, Tatranská Lomnica, Slovakia, 8.Slovak Central Observatory, Hurbanovo, Slovakia, 9.Slovak Hydrometeorological Institute, Bratislava, Slovak Republic)

*Paul Prikryl^1,2, Takumi Tsukijihara³, Koki Iwao⁴, Donald B Muldrew⁵, Robert Bruntz⁶, Vojto Rušin⁷, Milan Rybanský⁸, Maroš Turna⁹, Pavel Štastný⁹, Vladimír Pastircák⁹ (1.Physics Department, University of New Brunswick, Fredericton, NB, Canada, 2.Geomagnetic Laboratory, Natural Resources Canada, Ottawa, ON, Canada, 3.Department of Earth and Planetary Sciences, Kyushu University, Fukuoka, Japan, 4.National College of Technology, Kumamoto College, Yatsushiro, Japan, 5.Emeritus, Communications Research Centre, Ottawa, ON, Canada, 6.Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA, 7.Astronomical Institute, Slovak Academy of Sciences, Tatranská Lomnica, Slovakia, 8.Slovak Central Observatory, Hurbanovo, Slovakia, 9.Slovak Hydrometeorological Institute, Bratislava, Slovak Republic)