publication . Preprint . 2018

Dayside magnetospheric and ionospheric responses to a foreshock transient on June 25, 2008: 2. 2-D evolution based on dayside auroral imaging

Wang, Boyi; Nishimura, Yukitoshi; Hietala, Heli; Shen, Xiao-Chen; Shi, Quanqi; Zhang, Hui; Lyons, Larry; Zou, Ying; Angelopoulos, Vassilis; Ebihara, Yusuke; ...
Open Access English
  • Published: 27 Mar 2018
Abstract
The foreshock region involves localized and transient structures such as foreshock cavities and hot flow anomalies due to solar wind-bow shock interactions, and foreshock transients have been shown to lead to magnetospheric and ionospheric responses. In this paper, the interaction between a foreshock transient and the magnetosphere-ionosphere system is investigated using dayside aurora imagers revealing structures and propagation in greater detail than previously possible. A foreshock transient was detected by THEMIS-B and C during 1535-1545 UT on June 25, 2008. THEMIS-A, D and E observed magnetopause compression, cold plasma enhancement and ULF waves in the day...
Subjects
arXiv: Physics::Space PhysicsPhysics::GeophysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Earth and Planetary Astrophysics
free text keywords: Physics - Space Physics

9. Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan 10. School of Science and Engineering, Merrimack College, North Andover, Massachusetts, USA Horne, R. B., R. M. Thorne, N. P. Meredith, and R. R. Anderson (2003), Diffuse auroral electron scattering by electron cyclotron harmonic and whistler mode waves during an isolated substorm, J. Geophys. Res. Space Phys., 108(A7), 1290, doi:10.1029/2002JA009736. Holmes, J. M., M. G. Johnsen, C. S. Deehr, X.-Y. Zhou, and D. A. Lorentzen (2014), Circumpolar ground-based optical measurements of proton and electron shock aurora, J. Geophys. Res. Space Phys., 119(5), 2013JA019574, doi:10.1002/2013JA019574. Hudson, P. D. (1970), Discontinuities in an anisotropic plasma and their identification in the solar wind, Planet. Space Sci., 18, 1611-1622, doi:10.1016/0032-0633(70)90036-X. Jacobsen, K. S., et al. (2009), THEMIS observations of extreme magnetopause motion caused by a hot flow anomaly, J. Geophys. Res., 114, A08210, doi:10.1029/2008JA013873. Le, G., & Russell, C. T. (1992). A study of ULF wave foreshock morphology-I: ULF foreshock boundary. Planetary and space science, 40(9), 1203-1213. Li, W., R. M. Thorne, V. Angelopoulos, J. Bortnik, C. M. Cully, B. Ni, O. LeContel, A. Roux, U. Auster, and W. Magnes (2009), Global distribution of whistler-mode chorus waves observed on the THEMIS spacecraft, Geophys. Res. Lett., 36(9), L09104, doi:10.1029/2009GL037595.

Abstract
The foreshock region involves localized and transient structures such as foreshock cavities and hot flow anomalies due to solar wind-bow shock interactions, and foreshock transients have been shown to lead to magnetospheric and ionospheric responses. In this paper, the interaction between a foreshock transient and the magnetosphere-ionosphere system is investigated using dayside aurora imagers revealing structures and propagation in greater detail than previously possible. A foreshock transient was detected by THEMIS-B and C during 1535-1545 UT on June 25, 2008. THEMIS-A, D and E observed magnetopause compression, cold plasma enhancement and ULF waves in the day...
Subjects
arXiv: Physics::Space PhysicsPhysics::GeophysicsAstrophysics::High Energy Astrophysical PhenomenaAstrophysics::Earth and Planetary Astrophysics
free text keywords: Physics - Space Physics

9. Research Institute for Sustainable Humanosphere, Kyoto University, Kyoto, Japan 10. School of Science and Engineering, Merrimack College, North Andover, Massachusetts, USA Horne, R. B., R. M. Thorne, N. P. Meredith, and R. R. Anderson (2003), Diffuse auroral electron scattering by electron cyclotron harmonic and whistler mode waves during an isolated substorm, J. Geophys. Res. Space Phys., 108(A7), 1290, doi:10.1029/2002JA009736. Holmes, J. M., M. G. Johnsen, C. S. Deehr, X.-Y. Zhou, and D. A. Lorentzen (2014), Circumpolar ground-based optical measurements of proton and electron shock aurora, J. Geophys. Res. Space Phys., 119(5), 2013JA019574, doi:10.1002/2013JA019574. Hudson, P. D. (1970), Discontinuities in an anisotropic plasma and their identification in the solar wind, Planet. Space Sci., 18, 1611-1622, doi:10.1016/0032-0633(70)90036-X. Jacobsen, K. S., et al. (2009), THEMIS observations of extreme magnetopause motion caused by a hot flow anomaly, J. Geophys. Res., 114, A08210, doi:10.1029/2008JA013873. Le, G., & Russell, C. T. (1992). A study of ULF wave foreshock morphology-I: ULF foreshock boundary. Planetary and space science, 40(9), 1203-1213. Li, W., R. M. Thorne, V. Angelopoulos, J. Bortnik, C. M. Cully, B. Ni, O. LeContel, A. Roux, U. Auster, and W. Magnes (2009), Global distribution of whistler-mode chorus waves observed on the THEMIS spacecraft, Geophys. Res. Lett., 36(9), L09104, doi:10.1029/2009GL037595.

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