Do the observations confirm the high-speed flow braking model for substorms?

AG Yahnin, IA Kornilov, TA Kornilova, VA Sergeev, ATY Lui, K Liou, CI Meng, A Pajunpaa

Результат исследований: Публикации в книгах, отчётах, сборниках, трудах конференцийстатья в сборнике материалов конференциинаучнаярецензирование

Аннотация

We selected several cases when Geotal satellite situated in the mid-tail was in conjunction with ground-based all-sky TV cameras observing auroral breakups. Localisation of auroral events within the field of view of ground-based stations has been controlled by the Polar imager data. Some of the events exhibited the existence of high-speed (500-700 km/s) Earthward plasma flows within the plasma sheet before the breakups. To verify if the fast flow could be a cause of the breakups a detailed consideration and timing of the phenomena has been done. We concluded that in the considered cases there was no causal relationship between fast Earthward flows and breakups. In addition a search for auroral precursors, which could occur poleward of pre-breakup are just before breakup, has been performed. As such structures might be subvisual, some filtration methods were applied to the TV data. Our analysis did not show any auroral precursors. Thus, our observations failed to confirm the model of substorm, which connects the auroral onset with the braking of the high-speed Earthward plasma flow.

Язык оригиналаАнглийский
Название основной публикацииPROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON SUBSTORMS
РедакторыA Wilson
ИздательESA Publication Division
Страницы345-348
Число страниц4
ISBN (печатное издание)92-9092-772-0
СостояниеОпубликовано - 2000
Событие5th International Conference on Substorms - ST PETERSBURG
Продолжительность: 16 мая 200020 мая 2000

Серия публикаций

НазваниеESA SPECIAL PUBLICATIONS
ИздательESA PUBLICATIONS DIVISION C/O ESTEC
Том443
ISSN (печатное издание)0379-6566

конференция

конференция5th International Conference on Substorms
ГородST PETERSBURG
Период16/05/0020/05/00

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