Propagation of the preliminary reverse impulse of sudden commencements to low latitudes

P. J. Chi, C. T. Russell, J. Raeder, E. Zesta, K. Yumoto, H. Kawano, K. Kitamura, S. M. Petrinec, V. Angelopoulos, G. Le, M. B. Moldwin

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

It has been thought that the preliminary reverse impulse (PRI) of the sudden commencements (SC) phenomena occurs simultaneously on the ground at different locations. A popular explanation is that the PRI propagates through the Earth-ionosphere waveguide at the 35 ground magnetometer stations during the SC event on September 24, 1998, and found clear differences in the arrival time of PRI. We calculated the MHD wave propagation time from the location of the first compression of the magnetosphere to the low-latitude ground stations and found good agreement with the observed PRI arrival times. Our calculation also indicates that the wavefront is seriously distorted by the inhomogeneity of the magnetosphere and the small difference in PRI arrival time between high-latitude and low-latitude observations cannot be an indicator of a super-Alfvenic propagation. We also found implications that high-latitude PRIs can be induced by the vortex of ionospheric currents at nearby latitudes, and the motion of the current vortex can affect the arrival time of high-latitude PRIs.

Original languageEnglish
Article number2001JA900071
Pages (from-to)18857-18864
Number of pages8
JournalJournal of Geophysical Research: Space Physics
Volume106
Issue numberA9
Publication statusPublished - Sep 1 2001

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Magnetosphere
tropical regions
impulses
Vortex flow
arrivals
arrival time
propagation
Antenna grounds
Ionosphere
polar regions
Magnetometers
Wavefronts
Magnetohydrodynamics
Wave propagation
Waveguides
magnetospheres
Earth (planet)
magnetosphere
Earth-ionosphere waveguide
vortex

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Forestry
  • Oceanography
  • Aquatic Science
  • Ecology
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

Chi, P. J., Russell, C. T., Raeder, J., Zesta, E., Yumoto, K., Kawano, H., ... Moldwin, M. B. (2001). Propagation of the preliminary reverse impulse of sudden commencements to low latitudes. Journal of Geophysical Research: Space Physics, 106(A9), 18857-18864. [2001JA900071].

Propagation of the preliminary reverse impulse of sudden commencements to low latitudes. / Chi, P. J.; Russell, C. T.; Raeder, J.; Zesta, E.; Yumoto, K.; Kawano, H.; Kitamura, K.; Petrinec, S. M.; Angelopoulos, V.; Le, G.; Moldwin, M. B.

In: Journal of Geophysical Research: Space Physics, Vol. 106, No. A9, 2001JA900071, 01.09.2001, p. 18857-18864.

Research output: Contribution to journalArticle

Chi, PJ, Russell, CT, Raeder, J, Zesta, E, Yumoto, K, Kawano, H, Kitamura, K, Petrinec, SM, Angelopoulos, V, Le, G & Moldwin, MB 2001, 'Propagation of the preliminary reverse impulse of sudden commencements to low latitudes', Journal of Geophysical Research: Space Physics, vol. 106, no. A9, 2001JA900071, pp. 18857-18864.
Chi PJ, Russell CT, Raeder J, Zesta E, Yumoto K, Kawano H et al. Propagation of the preliminary reverse impulse of sudden commencements to low latitudes. Journal of Geophysical Research: Space Physics. 2001 Sep 1;106(A9):18857-18864. 2001JA900071.
Chi, P. J. ; Russell, C. T. ; Raeder, J. ; Zesta, E. ; Yumoto, K. ; Kawano, H. ; Kitamura, K. ; Petrinec, S. M. ; Angelopoulos, V. ; Le, G. ; Moldwin, M. B. / Propagation of the preliminary reverse impulse of sudden commencements to low latitudes. In: Journal of Geophysical Research: Space Physics. 2001 ; Vol. 106, No. A9. pp. 18857-18864.
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