Field-line resonances triggered by a northward IMF turning

H. Laakso; D. H. Fairfield; C. T. Russell; J. H. Clemmons; H. J. Singer; B. L. Giles; R. P. Lepping; F. S. Mozer; R. F. Pfaff; K. Tsuruda; J. R. Wygant

doi:10.1029/98GL51034

Field-line resonances triggered by a northward IMF turning

H. Laakso, D. H. Fairfield, C. T. Russell, J. H. Clemmons, H. J. Singer, B. L. Giles, R. P. Lepping, F. S. Mozer, R. F. Pfaff, K. Tsuruda, J. R. Wygant

Physics and Astronomy (Twin Cities)

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11 Scopus citations

Abstract

A sudden northward rotation of the IMF observed by IMP 8 near the bow shock at 21:22 UT on January 10, 1997, triggered surface waves and fast mode waves at the flanks of the duskside magnetosphere, as observed by GEOTAIL instruments. The power spectral density of these waves peaked in the frequency range where field-line resonances were observed by the POLAR satellite in the region L = 6.6-10.2. The oscillation periods of the observed field-line resonances were L-dependent with two distinct peaks which may be explained by increased heavy ion content at those field lines. The ULF waves also caused enhanced low-energy ion fluxes from the ionosphere.

Original language	English (US)
Pages (from-to)	2991-2994
Number of pages	4
Journal	Geophysical Research Letters
Volume	25
Issue number	15
DOIs	https://doi.org/10.1029/98GL51034
State	Published - Aug 1 1998

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title = "Field-line resonances triggered by a northward IMF turning",

abstract = "A sudden northward rotation of the IMF observed by IMP 8 near the bow shock at 21:22 UT on January 10, 1997, triggered surface waves and fast mode waves at the flanks of the duskside magnetosphere, as observed by GEOTAIL instruments. The power spectral density of these waves peaked in the frequency range where field-line resonances were observed by the POLAR satellite in the region L = 6.6-10.2. The oscillation periods of the observed field-line resonances were L-dependent with two distinct peaks which may be explained by increased heavy ion content at those field lines. The ULF waves also caused enhanced low-energy ion fluxes from the ionosphere.",

author = "H. Laakso and Fairfield, {D. H.} and Russell, {C. T.} and Clemmons, {J. H.} and Singer, {H. J.} and Giles, {B. L.} and Lepping, {R. P.} and Mozer, {F. S.} and Pfaff, {R. F.} and K. Tsuruda and Wygant, {J. R.}",

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TY - JOUR

T1 - Field-line resonances triggered by a northward IMF turning

AU - Laakso, H.

AU - Fairfield, D. H.

AU - Russell, C. T.

AU - Clemmons, J. H.

AU - Singer, H. J.

AU - Giles, B. L.

AU - Lepping, R. P.

AU - Mozer, F. S.

AU - Pfaff, R. F.

AU - Tsuruda, K.

AU - Wygant, J. R.

PY - 1998/8/1

Y1 - 1998/8/1

N2 - A sudden northward rotation of the IMF observed by IMP 8 near the bow shock at 21:22 UT on January 10, 1997, triggered surface waves and fast mode waves at the flanks of the duskside magnetosphere, as observed by GEOTAIL instruments. The power spectral density of these waves peaked in the frequency range where field-line resonances were observed by the POLAR satellite in the region L = 6.6-10.2. The oscillation periods of the observed field-line resonances were L-dependent with two distinct peaks which may be explained by increased heavy ion content at those field lines. The ULF waves also caused enhanced low-energy ion fluxes from the ionosphere.

AB - A sudden northward rotation of the IMF observed by IMP 8 near the bow shock at 21:22 UT on January 10, 1997, triggered surface waves and fast mode waves at the flanks of the duskside magnetosphere, as observed by GEOTAIL instruments. The power spectral density of these waves peaked in the frequency range where field-line resonances were observed by the POLAR satellite in the region L = 6.6-10.2. The oscillation periods of the observed field-line resonances were L-dependent with two distinct peaks which may be explained by increased heavy ion content at those field lines. The ULF waves also caused enhanced low-energy ion fluxes from the ionosphere.

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U2 - 10.1029/98GL51034

DO - 10.1029/98GL51034

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JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 15

ER -

Field-line resonances triggered by a northward IMF turning

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