Could a Low‐Frequency Perturbation in the Earth's Magnetotail Be Generated by the Lunar Wake?
Abstract Both ground based magnetometers and ionospheric radars at Earth have frequently detected Ultra Low Frequency (ULF) fluctuations at discrete frequencies extending below one mHz‐range. Many dayside solar wind drivers have been convincingly demonstrated as driver mechanisms. In this paper we investigate and propose an additional, nightside generation mechanism of a low frequency magnetic field fluctuation. We propose that the Moon may excite a magnetic field perturbation of the order of 1 nT at discrete frequencies when it travels through the Earth's magnetotail 4–5 days every month. Our theoretical prediction is supported by a case study of ARTEMIS magnetic field measurements at the lunar orbit in the Earth's magnetotail. ARTEMIS detects statistically significant peaks in magnetic field fluctuation power at frequencies of 0.37–0.47 mHz that are not present in the solar wind.
Authors
- M. Sarantos (ORCID: https://orcid.org/0000-0003-0728-2971)
- Martin Archer (ORCID: https://orcid.org/0000-0003-1556-4573)
- K. Nykyri (ORCID: https://orcid.org/0000-0002-6905-9487)
- Xuanye Ma (ORCID: https://orcid.org/0000-0003-3942-1649)
- W. R. Paterson (ORCID: https://orcid.org/0000-0001-9695-8149)
- Simone Di Matteo (ORCID: https://orcid.org/0000-0001-6407-7574)
- Michael D. Hartinger (ORCID: https://orcid.org/0000-0002-2643-2202)
- E. Zesta (ORCID: https://orcid.org/0000-0002-1899-5275)
Institutions
- Space Science Institute (US)
- Goddard Space Flight Center (US)
- University of California, Los Angeles (US)
- University of America (US)
- Imperial College London (GB)
- Catholic University of America (US)
- Embry–Riddle Aeronautical University (US)
Publication Details
- Journal
- Geophysical Research Letters
- Published
- 2024-11-25
- DOI
- https://doi.org/10.1029/2024gl110129
- Citations
- 4
- Primary Topic
- Ionosphere and magnetosphere dynamics
- Type
- article
- Field-Weighted Citation Impact
- 1.33
Funders
- National Science Foundation
- National Aeronautics and Space Administration
- UK Research and Innovation
- Nuclear Safety and Security Commission
- Engineering and Physical Sciences Research Council
- Science and Technology Facilities Council