Dayside magnetopause Pc 3 and Pc 5 ULF waves observed by the GEOTAIL Satellite
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- Sakurai Tohru
- Department of Aeronautics and Astronautics, School of Engineering, Tokai University
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- Tonegawa Yutaka
- Department of Aeronautics and Astronautics, School of Engineering, Tokai University
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- Kitagawa Takuya
- Department of Aeronautics and Astronautics, School of Engineering, Tokai University
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- Yumoto Kiyofumi
- Department of Earth and Planetary Sciences, Kyushu University
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- Yamamoto Tatsundo
- The Institute of Space and Aeronautical Science
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- Kokubun Susumu
- Solar Terrestrial Environmental Laboratory of Nagoya University
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- Mukai Toshifumi
- The Institute of Space and Aeronautical Science
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- Tsuruda Koichiro
- The Institute of Space and Aeronautical Science
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This study is intended to reveal the oscillation and propagation characteristics of ULF waves observed near the dayside magnetopause. A comparative study of such ULF wave phenomena is made by using the data obtained from the successive skimmings of the dayside magnetopause by the GEOTAIL Satellite performed on three successive days of 9, 18, and 27 December 1994. The instrumentations of GEOTAIL are good for such a task, since the satellite simultaneously measured the magnetic and electric fields, and low energy plasma data. Based the observed data, we studied the dynamic spectral characteristics of both magnetic and electric fields. The results revealed that the dominant ULF waves appearing in the dynamic spectra were Pc 3 and Pc 5 oscillations. The Pc 3 oscillations were observed during a limited local time around noon without an extension to the dawn and dusk flanks, and dominantly appeared at a frequency of -25 mHz in the azimuthal component of the magnetic field. This frequency component showed clear resonant oscillation characteristics. In addition to this, a fast mode earthward propagation characteristic was also recognized. The Poynting flux of the Pc 3 signals showed that the energy flux was about 10 nJ/m2s on average, the strongest being along the magnetic field line. Pc 5 oscillations showed another dominant spectral power which appeared in the radial component of the electric field, suggesting that the resonance oscillations were well established. However, the Pc 5 oscillations in the subsolar region did not show any earthward propagation characteristics.
収録刊行物
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- Earth, Planets and Space
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Earth, Planets and Space 51 (9), 965-978, 1999
地球電磁気・地球惑星圏学会 、公益社団法人 日本地震学会、特定非営利活動法人 日本火山学会、日本測地学会、日本惑星科学会
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詳細情報 詳細情報について
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- CRID
- 1390282681486939008
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- NII論文ID
- 10002698502
- 130003780757
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- NII書誌ID
- AA11211921
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- ISSN
- 18805981
- 13438832
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- NDL書誌ID
- 4891181
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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