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Title: Observations of tail dynamics using ground and space based instruments during a period of multiple substorm events
Authors: Forsyth, Colin
Lester, M.
Milan, Steve E.
Grocott, Adrian
Frey, H.U.
Lucek, E.
Rème, H.
Watermann, J.F.
First Published: Mar-2006
Publisher: University of Calgary
Citation: Proceedings of the Eighth International Conference on Substorms (ICS-8), edited by M. Syrjäsuo and E.F. Donovan: University of Calgary, Alberta, Canada, pp. 65-70.
Abstract: We present initial observations from an ongoing investigation into the dynamics of the magnetotail during a period of multiple substorms. The investigation coordinates data from ground and space-based instruments including the Cluster and IMAGE spacecraft, SuperDARN and ground magnetometers during the period 00:00UT to 05:00UT on 25th August, 2003. The first substorm expansion phase, which is preceded by two pseudo-breakups at 00:38UT and 00:57UT, takes place between 01:11UT and 01:50UT during which time IMAGE WIC(FUV) data for the Southern auroral oval shows enhanced auroral activity almost solely in the post-midnight sector and the occurrence of auroral streamers within the auroral bulge. SuperDARN map potential analysis shows a flow diversion with a northern hemisphere footprint that is conjugate to a southern hemisphere auroral streamer. During this time, Cluster CIS and FGM instruments detect the passage of under-populated flux tubes, or plasma bubbles, and a field rotation event, discussed as a flux rope. These observations agree with current predictions on the relationship between streamers and under-populated flux tubes in the tail from the Chen and Wolf model.
Type: Conference paper
Description: This paper was presented at the Eighth International Conference on Substorms (ICS-8), held at the University of Calgary, Alberta, Canada, 27-31 March, 2006, and published in Proceedings of the Eighth International Conference on Substorms, edited by M. Syrjäsuo and E.F. Donovan, pp. 65-70. It is available from
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Appears in Collections:Conference Papers & Presentations, Dept. of Physics and Astronomy

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