1. Institute of Space Physics and Applied Technology; Peking University; Beijing China
2. Solar-Terrestrial Environmental Laboratory; Nagoya University; Nagoya Japan
3. Department of Physics; University of Alberta; Edmonton Alberta Cananda
4. Department of Physics Institute for Earth, Oceans and Space; University of New Hampshire; Durham NH USA
5. Los Alamos National Laboratory; Los Alamos NM USA
6. School of Physics and Astronomy; University of Minnesota, Twin Cities; Minneapolis MN USA
7. Department of Physics and Astronomy; University of Iowa; Iowa City IA USA