Correlation between ground-based observations of substorm signatures and magnetotail dynamics
نویسندگان
چکیده
منابع مشابه
Correlation between ground-based observations of substorm signatures and magnetotail dynamics
We present a substorm event study using the four Cluster spacecraft in combination with ground-based instruments, in order to perform simultaneous observations in the ionosphere and magnetotail. We show good correlation between substorm signatures on the ground and in the magnetotail, even though data from the northern-ground and southern-tail hemispheres are compared. During this event ground-...
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Violent releases of space plasma energy from the Earth's magnetotail during substorms produce strong electric currents and bright aurora. But what modulates these currents and aurora and controls dissipation of the energy released in the ionosphere? Using data from the THEMIS fleet of satellites and ground-based imagers and magnetometers, we show that plasma energy dissipation is controlled by ...
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[1] In this paper, we present comprehensive ground‐based and space‐based in situ geosynchronous observations of a substorm expansion phase onset on 1 October 2005. The Double Star TC‐2 and GOES‐12 spacecraft were both located within the substorm current wedge during the substorm expansion phase onset, which occurred over the Canadian sector. We find that an onset of ULF waves in space was obser...
متن کاملSubstorm Associated Magnetotail Field and Plasma Fluctuations: a Case Study
A sudden dipolarization followed by long period ( 25 min) magnetic compression-like fluctuations with shorter period waves superimposed on them was observed by the WIND spacecraft in the magnetotail near midnight at 15RE from the earth on Sep 17, 1995. The spacecraft was near the boundary between the northern tail lobe and the plasmasheet. Observations of anticorrelation between the variations ...
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An attempt is made to search for a critical condition in the lobe magnetic field to initiate large-scale magnetic field changes associated with substorm expansions. Using data from ISEE-1 for 1978, sudden decreases in the lobe magnetic field accompanied by magnetic field dipolarizations are identified. In this study, such events are designated as the magnetotail deflation. The magnetic field co...
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ژورنال
عنوان ژورنال: Annales Geophysicae
سال: 2005
ISSN: 1432-0576
DOI: 10.5194/angeo-23-997-2005