Simultaneous THEMIS in situ and auroral observations of a small substorm

E. Donovan; W. Liu; J. Liang; E. Spanswick; I. Voronkov; M. Connors; M. Syrjäsuo; G. Baker; B. Jackel; T. Trondsen; M. Greffen; V. Angelopoulos; C. T. Russell; S. B. Mende; H. U. Frey; A. Keiling; C. W. Carlson; J. P. McFadden; K. H. Glassmeier; U. Auster; K. Hayashi; K. Sakaguchi; K. Shiokawa; J. A. Wild; I. J. Rae

doi:10.1029/2008GL033794

Simultaneous THEMIS in situ and auroral observations of a small substorm

E. Donovan, W. Liu, J. Liang, E. Spanswick, I. Voronkov, M. Connors, M. Syrjäsuo, G. Baker, B. Jackel, T. Trondsen, M. Greffen, V. Angelopoulos, C. T. Russell, S. B. Mende, H. U. Frey, A. Keiling, C. W. Carlson, J. P. McFadden, K. H. Glassmeier, U. AusterK. Hayashi, K. Sakaguchi, K. Shiokawa, J. A. Wild, I. J. Rae

Centre for Science

Research output: Contribution to journal › Journal Article › peer-review

89 Citations (Scopus)

Abstract

We present ground-based and in situ observations from March 13, 2007. The THEMIS satellites were in the evening sector conjugate to THEMIS ground-based imagers. At ∼0507 UT there was an optical onset on inner CPS field lines. This involved near-simultaneous brightening of 1 MLT hour longitudinal segment of the onset arc. The part of the arc that brightened was that closest to the equatorward boundary of the diffuse (proton) aurora. Within one minute, a dipolarization front moved across four THEMIS satellites. Based on their locations, the order in which they detected the dipolarization front, and the auroral evolution, we assert that the expansion phase began earthward of the four satellites and evolved radially outwards. We conclude that this onset occurred in an azimuthally localized region of highly stretched field lines.

Original language	English
Article number	L17S18
Journal	Geophysical Research Letters
Volume	35
Issue number	17
DOIs	https://doi.org/10.1029/2008GL033794
Publication status	Published - 16 Sep. 2008

Access to Document

10.1029/2008GL033794

Cite this

Donovan, E., Liu, W., Liang, J., Spanswick, E., Voronkov, I., Connors, M., Syrjäsuo, M., Baker, G., Jackel, B., Trondsen, T., Greffen, M., Angelopoulos, V., Russell, C. T., Mende, S. B., Frey, H. U., Keiling, A., Carlson, C. W., McFadden, J. P., Glassmeier, K. H., ... Rae, I. J. (2008). Simultaneous THEMIS in situ and auroral observations of a small substorm. Geophysical Research Letters, 35(17), Article L17S18. https://doi.org/10.1029/2008GL033794

@article{fb20e504740f45b5be1942e723e5c859,

title = "Simultaneous THEMIS in situ and auroral observations of a small substorm",

abstract = "We present ground-based and in situ observations from March 13, 2007. The THEMIS satellites were in the evening sector conjugate to THEMIS ground-based imagers. At ∼0507 UT there was an optical onset on inner CPS field lines. This involved near-simultaneous brightening of 1 MLT hour longitudinal segment of the onset arc. The part of the arc that brightened was that closest to the equatorward boundary of the diffuse (proton) aurora. Within one minute, a dipolarization front moved across four THEMIS satellites. Based on their locations, the order in which they detected the dipolarization front, and the auroral evolution, we assert that the expansion phase began earthward of the four satellites and evolved radially outwards. We conclude that this onset occurred in an azimuthally localized region of highly stretched field lines.",

author = "E. Donovan and W. Liu and J. Liang and E. Spanswick and I. Voronkov and M. Connors and M. Syrj{\"a}suo and G. Baker and B. Jackel and T. Trondsen and M. Greffen and V. Angelopoulos and Russell, {C. T.} and Mende, {S. B.} and Frey, {H. U.} and A. Keiling and Carlson, {C. W.} and McFadden, {J. P.} and Glassmeier, {K. H.} and U. Auster and K. Hayashi and K. Sakaguchi and K. Shiokawa and Wild, {J. A.} and Rae, {I. J.}",

year = "2008",

month = sep,

day = "16",

doi = "10.1029/2008GL033794",

language = "English",

volume = "35",

number = "17",

}

Donovan, E, Liu, W, Liang, J, Spanswick, E, Voronkov, I, Connors, M, Syrjäsuo, M, Baker, G, Jackel, B, Trondsen, T, Greffen, M, Angelopoulos, V, Russell, CT, Mende, SB, Frey, HU, Keiling, A, Carlson, CW, McFadden, JP, Glassmeier, KH, Auster, U, Hayashi, K, Sakaguchi, K, Shiokawa, K, Wild, JA & Rae, IJ 2008, 'Simultaneous THEMIS in situ and auroral observations of a small substorm', Geophysical Research Letters, vol. 35, no. 17, L17S18. https://doi.org/10.1029/2008GL033794

TY - JOUR

T1 - Simultaneous THEMIS in situ and auroral observations of a small substorm

AU - Donovan, E.

AU - Liu, W.

AU - Liang, J.

AU - Spanswick, E.

AU - Voronkov, I.

AU - Connors, M.

AU - Syrjäsuo, M.

AU - Baker, G.

AU - Jackel, B.

AU - Trondsen, T.

AU - Greffen, M.

AU - Angelopoulos, V.

AU - Russell, C. T.

AU - Mende, S. B.

AU - Frey, H. U.

AU - Keiling, A.

AU - Carlson, C. W.

AU - McFadden, J. P.

AU - Glassmeier, K. H.

AU - Auster, U.

AU - Hayashi, K.

AU - Sakaguchi, K.

AU - Shiokawa, K.

AU - Wild, J. A.

AU - Rae, I. J.

PY - 2008/9/16

Y1 - 2008/9/16

N2 - We present ground-based and in situ observations from March 13, 2007. The THEMIS satellites were in the evening sector conjugate to THEMIS ground-based imagers. At ∼0507 UT there was an optical onset on inner CPS field lines. This involved near-simultaneous brightening of 1 MLT hour longitudinal segment of the onset arc. The part of the arc that brightened was that closest to the equatorward boundary of the diffuse (proton) aurora. Within one minute, a dipolarization front moved across four THEMIS satellites. Based on their locations, the order in which they detected the dipolarization front, and the auroral evolution, we assert that the expansion phase began earthward of the four satellites and evolved radially outwards. We conclude that this onset occurred in an azimuthally localized region of highly stretched field lines.

AB - We present ground-based and in situ observations from March 13, 2007. The THEMIS satellites were in the evening sector conjugate to THEMIS ground-based imagers. At ∼0507 UT there was an optical onset on inner CPS field lines. This involved near-simultaneous brightening of 1 MLT hour longitudinal segment of the onset arc. The part of the arc that brightened was that closest to the equatorward boundary of the diffuse (proton) aurora. Within one minute, a dipolarization front moved across four THEMIS satellites. Based on their locations, the order in which they detected the dipolarization front, and the auroral evolution, we assert that the expansion phase began earthward of the four satellites and evolved radially outwards. We conclude that this onset occurred in an azimuthally localized region of highly stretched field lines.

UR - http://www.scopus.com/inward/record.url?scp=57049186342&partnerID=8YFLogxK

U2 - 10.1029/2008GL033794

DO - 10.1029/2008GL033794

M3 - Journal Article

AN - SCOPUS:57049186342

SN - 0094-8276

VL - 35

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 17

M1 - L17S18

ER -

Simultaneous THEMIS in situ and auroral observations of a small substorm

Abstract

Access to Document

Other files and links

Fingerprint

Cite this