A flux rope followed by recurring encounters with traveling compression regions: GEOTAIL observations

H. Kawano; T. Yamamoto; S. Kokubun; K. Tsuruda; A. T.Y. Lui; D. J. Williams; K. Yumoto; H. Hayakawa; M. Nakamura; T. Okada; A. Matsuoka; K. Shiokawa; A. Nishida

doi:10.1029/94GL02101

A flux rope followed by recurring encounters with traveling compression regions: GEOTAIL observations

H. Kawano, T. Yamamoto, S. Kokubun, K. Tsuruda, A. T.Y. Lui, D. J. Williams, K. Yumoto, H. Hayakawa, M. Nakamura, T. Okada, A. Matsuoka, K. Shiokawa, A. Nishida

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Abstract

This paper reports a peculiar series of events observed with Geotail on October 24, 1992 at X ≃ −80 R_E. On this day a combination of a bipolar perturbation in B_y and a double‐peaked perturbation in B_z, signature of a flux rope, was observed. Following this flux rope, bipolar B_z events, identifiable as Traveling Compression Regions (TCRs), were recurrently observed. The axis of the flux rope was deduced to be field‐aligned. Energetic ions (electrons) streamed earthward (tailward) in the flux rope. During the TCRs, the E×B flow showed a bipolar north‐then‐south perturbation, consistent with expected lobe plasma motion. The TCRs corresponded to weak ground magnetic disturbances and Pi2 waves. The observations can be explained by a model in which quasi‐stagnant plasmoids (Nishida et al., 1986) are recurrently generated.

Original language	English
Pages (from-to)	2891-2894
Number of pages	4
Journal	Geophysical Research Letters
Volume	21
Issue number	25
DOIs	https://doi.org/10.1029/94GL02101
Publication status	Published - Dec 15 1994
Externally published	Yes

All Science Journal Classification (ASJC) codes

Geophysics
Earth and Planetary Sciences(all)

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10.1029/94GL02101

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Kawano, H., Yamamoto, T., Kokubun, S., Tsuruda, K., Lui, A. T. Y., Williams, D. J., Yumoto, K., Hayakawa, H., Nakamura, M., Okada, T., Matsuoka, A., Shiokawa, K., & Nishida, A. (1994). A flux rope followed by recurring encounters with traveling compression regions: GEOTAIL observations. Geophysical Research Letters, 21(25), 2891-2894. https://doi.org/10.1029/94GL02101

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title = "A flux rope followed by recurring encounters with traveling compression regions: GEOTAIL observations",

abstract = "This paper reports a peculiar series of events observed with Geotail on October 24, 1992 at X ≃ −80 RE. On this day a combination of a bipolar perturbation in By and a double‐peaked perturbation in Bz, signature of a flux rope, was observed. Following this flux rope, bipolar Bz events, identifiable as Traveling Compression Regions (TCRs), were recurrently observed. The axis of the flux rope was deduced to be field‐aligned. Energetic ions (electrons) streamed earthward (tailward) in the flux rope. During the TCRs, the E×B flow showed a bipolar north‐then‐south perturbation, consistent with expected lobe plasma motion. The TCRs corresponded to weak ground magnetic disturbances and Pi2 waves. The observations can be explained by a model in which quasi‐stagnant plasmoids (Nishida et al., 1986) are recurrently generated.",

author = "H. Kawano and T. Yamamoto and S. Kokubun and K. Tsuruda and Lui, {A. T.Y.} and Williams, {D. J.} and K. Yumoto and H. Hayakawa and M. Nakamura and T. Okada and A. Matsuoka and K. Shiokawa and A. Nishida",

year = "1994",

month = dec,

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doi = "10.1029/94GL02101",

language = "English",

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journal = "Geophysical Research Letters",

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T2 - GEOTAIL observations

AU - Kawano, H.

AU - Yamamoto, T.

AU - Kokubun, S.

AU - Tsuruda, K.

AU - Lui, A. T.Y.

AU - Williams, D. J.

AU - Yumoto, K.

AU - Hayakawa, H.

AU - Nakamura, M.

AU - Okada, T.

AU - Matsuoka, A.

AU - Shiokawa, K.

AU - Nishida, A.

PY - 1994/12/15

Y1 - 1994/12/15

N2 - This paper reports a peculiar series of events observed with Geotail on October 24, 1992 at X ≃ −80 RE. On this day a combination of a bipolar perturbation in By and a double‐peaked perturbation in Bz, signature of a flux rope, was observed. Following this flux rope, bipolar Bz events, identifiable as Traveling Compression Regions (TCRs), were recurrently observed. The axis of the flux rope was deduced to be field‐aligned. Energetic ions (electrons) streamed earthward (tailward) in the flux rope. During the TCRs, the E×B flow showed a bipolar north‐then‐south perturbation, consistent with expected lobe plasma motion. The TCRs corresponded to weak ground magnetic disturbances and Pi2 waves. The observations can be explained by a model in which quasi‐stagnant plasmoids (Nishida et al., 1986) are recurrently generated.

AB - This paper reports a peculiar series of events observed with Geotail on October 24, 1992 at X ≃ −80 RE. On this day a combination of a bipolar perturbation in By and a double‐peaked perturbation in Bz, signature of a flux rope, was observed. Following this flux rope, bipolar Bz events, identifiable as Traveling Compression Regions (TCRs), were recurrently observed. The axis of the flux rope was deduced to be field‐aligned. Energetic ions (electrons) streamed earthward (tailward) in the flux rope. During the TCRs, the E×B flow showed a bipolar north‐then‐south perturbation, consistent with expected lobe plasma motion. The TCRs corresponded to weak ground magnetic disturbances and Pi2 waves. The observations can be explained by a model in which quasi‐stagnant plasmoids (Nishida et al., 1986) are recurrently generated.

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JF - Geophysical Research Letters

SN - 0094-8276

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ER -

A flux rope followed by recurring encounters with traveling compression regions: GEOTAIL observations

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