Oscillations of magnetospheric boundaries driven by IMF rotations

H. Laakso; D. H. Fairfield; M. R. Collier; H. Opgenoorth; T. D. Phan; D. G. Sibeck; B. L. Giles; H. J. Singer; R. P. Lepping; R. P. Lin; F. S. Mozer; R. F. Pfaff; K. Tsuruda; J. R. Wygant

doi:10.1029/98GL50916

Oscillations of magnetospheric boundaries driven by IMF rotations

H. Laakso, D. H. Fairfield, M. R. Collier, H. Opgenoorth, T. D. Phan, D. G. Sibeck, B. L. Giles, H. J. Singer, R. P. Lepping, R. P. Lin, F. S. Mozer, R. F. Pfaff, K. Tsuruda, J. R. Wygant

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Abstract

The arrival of the magnetic cloud on January 10, 1997, 01:05 UT, was preceded by a 12-hour interval of increased fluctuations in the IMF orientation, which drove boundary oscillations in the magnetosphere. The GEOTAIL spacecraft, initially located near the dawnside magnetopause, experienced multiple crossings of the magnetopause; at the geosynchronous distance, GOES 9 observed weak perturbations associated with these oscillations. During this time, the POLAR spacecraft encountered the dense high-latitude boundary layer, followed by several rapid encounters with the tenuous lobe. The boundary between the mantle and the lobe was observed to be thin as the crossings lasted only 30 seconds. The source of these boundary oscillations is magnetosheath pressure variations produced by rapid IMF directional changes.

Original language	English (US)
Pages (from-to)	3007-3010
Number of pages	4
Journal	Geophysical Research Letters
Volume	25
Issue number	15
DOIs	https://doi.org/10.1029/98GL50916
State	Published - Aug 1 1998
Externally published	Yes

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title = "Oscillations of magnetospheric boundaries driven by IMF rotations",

abstract = "The arrival of the magnetic cloud on January 10, 1997, 01:05 UT, was preceded by a 12-hour interval of increased fluctuations in the IMF orientation, which drove boundary oscillations in the magnetosphere. The GEOTAIL spacecraft, initially located near the dawnside magnetopause, experienced multiple crossings of the magnetopause; at the geosynchronous distance, GOES 9 observed weak perturbations associated with these oscillations. During this time, the POLAR spacecraft encountered the dense high-latitude boundary layer, followed by several rapid encounters with the tenuous lobe. The boundary between the mantle and the lobe was observed to be thin as the crossings lasted only 30 seconds. The source of these boundary oscillations is magnetosheath pressure variations produced by rapid IMF directional changes.",

author = "H. Laakso and Fairfield, {D. H.} and Collier, {M. R.} and H. Opgenoorth and Phan, {T. D.} and Sibeck, {D. G.} and Giles, {B. L.} and Singer, {H. J.} and Lepping, {R. P.} and Lin, {R. P.} and Mozer, {F. S.} and Pfaff, {R. F.} and K. Tsuruda and Wygant, {J. R.}",

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T1 - Oscillations of magnetospheric boundaries driven by IMF rotations

AU - Laakso, H.

AU - Fairfield, D. H.

AU - Collier, M. R.

AU - Opgenoorth, H.

AU - Phan, T. D.

AU - Sibeck, D. G.

AU - Giles, B. L.

AU - Singer, H. J.

AU - Lepping, R. P.

AU - Lin, 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 - The arrival of the magnetic cloud on January 10, 1997, 01:05 UT, was preceded by a 12-hour interval of increased fluctuations in the IMF orientation, which drove boundary oscillations in the magnetosphere. The GEOTAIL spacecraft, initially located near the dawnside magnetopause, experienced multiple crossings of the magnetopause; at the geosynchronous distance, GOES 9 observed weak perturbations associated with these oscillations. During this time, the POLAR spacecraft encountered the dense high-latitude boundary layer, followed by several rapid encounters with the tenuous lobe. The boundary between the mantle and the lobe was observed to be thin as the crossings lasted only 30 seconds. The source of these boundary oscillations is magnetosheath pressure variations produced by rapid IMF directional changes.

AB - The arrival of the magnetic cloud on January 10, 1997, 01:05 UT, was preceded by a 12-hour interval of increased fluctuations in the IMF orientation, which drove boundary oscillations in the magnetosphere. The GEOTAIL spacecraft, initially located near the dawnside magnetopause, experienced multiple crossings of the magnetopause; at the geosynchronous distance, GOES 9 observed weak perturbations associated with these oscillations. During this time, the POLAR spacecraft encountered the dense high-latitude boundary layer, followed by several rapid encounters with the tenuous lobe. The boundary between the mantle and the lobe was observed to be thin as the crossings lasted only 30 seconds. The source of these boundary oscillations is magnetosheath pressure variations produced by rapid IMF directional changes.

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JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 15

ER -

Oscillations of magnetospheric boundaries driven by IMF rotations

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