1. Center for Space Physics Boston University Boston MA USA
2. Department of Atmospheric and Oceanic Sciences University of California Los Angeles CA USA
3. Department of Earth, Planetary, and Space Sciences University of California Los Angeles CA USA
4. Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder CO USA
5. National Centers for Environmental Information, NOAA Boulder CO USA
6. Department of Physics Augsburg University Minneapolis MN USA
7. Department of Physics and Astronomy University of Iowa Iowa City IA USA
8. Institute for the Study of Earth, Oceans, and Space University of New Hampshire Durham NH USA
9. Space Science and Applications Group Los Alamos National Laboratory Los Alamos NM USA
10. Sodankylä Geophysical Observatory University of Oulu Sodankylä Finland