1. Key Laboratory of Earth and Planetary Physics Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
2. Beijing National Observatory of Space Environment Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
3. College of Earth and Planetary Sciences University of Chinese Academy of Sciences Beijing China
4. Mohe Geophysical Observatory Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China
5. School of Physical Sciences University of Adelaide Adelaide SA Australia
6. ATRAD Pty Ltd Adelaide SA Australia