Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm22b..09s&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM22B-09
Physics
2407 Auroral Ionosphere (2704), 2744 Magnetotail, 2788 Storms And Substorms
Scientific paper
Recent studies have shown that some earthward bursty bulk flows contain embedded magnetic flux ropes. We will present the results of a survey of Geotail measurements taken during the November 1998 to April 1999 ``tail season''. A total of 35 events were identified and analyzed using a well-tested force-free flux rope model. These flux ropes were observed from GSM X ~ -14 to 30 Re, Y ~ -16 to +18 Re and Z ~ +6 to - 4 Re. All were embedded in earthward BBFs with a mean flow speed of 500 km/s. In most instances, the flux ropes were observed to follow the initiation of the earthward flow event by ~ 1-3 min. The mean flux rope duration was ~ 30 sec corresponding to a diameter of 2.5 Re. Additional results concerning the ion distributions measured by the LEP instrument in the vicinity of selected flux ropes will also be presented. Finally, the implications of these flux rope events for the nature of the reconnection process in the near tail will be discussed.
Fairfield Donald H.
Hesse Matthias
Ieda A.
Lepping Ronald P.
Mist R.
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