Department of Physics and Astronomy, University of California, Los Angeles, USA

Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California, USA

Department of Physics and Astronomy, University of California, Los Angeles, USA

Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California, USA

Department of Physics and Astronomy, University of California, Los Angeles, USA

Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California, USA

Institute of Geophysics and Planetary Physics, University of California, Los Angeles, California, USA

Department of Earth and Space Sciences, University of California, Los Angeles, California, USA

Geospace Physics Laboratory, Code 673 Goddard Space Flight Center Greenbelt, MD 20771, USA