Location and propagation of the magnetotail current disruption during substorm expansion: Analysis and simulation of an ISEE multi‐onset event

C. Jacquey, J. A. Sauvaud, J. Dandouras

doi:10.1029/90gl02789

Location and propagation of the magnetotail current disruption during substorm expansion: Analysis and simulation of an ISEE multi‐onset event

DOI Web Site Web Site 被引用文献7件

書誌事項

公開日: 1991-03

権利情報

http://onlinelibrary.wiley.com/termsAndConditions#vor

DOI

10.1029/90gl02789

公開者: American Geophysical Union (AGU)

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説明

<jats:p>Magnetic field variations measured onboard the ISEE‐1 spacecraft in the tail northern lobe (∼22 R<jats:sub>E</jats:sub> geocentric distance) during a substorm with multiple onsets are analyzed and simulated using a model current sheet. This remote sensing study of the cross‐tail current sheet shows that substorm onsets are associated with a partial disruption of the cross‐tail current that begins in the near‐earth plasma sheet (∼7 R<jats:sub>E</jats:sub>) and that expands tailward during substorm expansion with a velocity of the order of 300 km/s. The two consecutive substorm onsets, which occur during a very active period (AE > 500 nT), correspond to a similar partial disruption of the near‐earth current sheet that expands tailwards over a distance of the order of 80 R<jats:sub>E</jats:sub>.</jats:p>