1. Center for Space Weather Sciences, Institute of Space Sciences, School of Space Science and Physics; Shandong University at Weihai; Weihai China
2. Department of Physics and Astronomy; University of Southampton; Southampton UK
3. Space and Planetary Physics Group, Department of Physics; Lancaster University; Lancaster UK
4. Institute of Space Physics and Applied Technology, School of Earth and Space Sciences; Peking University; Beijing China
5. Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics; Chinese Academy of Sciences; Beijing China
6. Geophysical Institute; University of Alaska Fairbanks; Fairbanks AK USA