Physics
Scientific paper
Dec 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm41a1846f&link_type=abstract
American Geophysical Union, Fall Meeting 2010, abstract #SM41A-1846
Physics
[2764] Magnetospheric Physics / Plasma Sheet
Scientific paper
Fast flows are believed to be very important phenomena in the plasmasheet, especially during geomagnetic active times. It is very often to observe magnetic structures (flux ropes or plasmoids) during the passage of fast flows. However, the relationship between fast flows and magnetic structures is not very clear, and it is critical in understanding the formation mechanism of fast flows. Here we present superposed epoch analysis results for BBFs observed by Cluster during its tail season, and fast flows obtained by THEMIS satellites at different positions. It is shown that although Bz decrease could be observed before the arriving of fast flows, detailed examine for different cases demonstrate that not all of the events are associated with magnetic structures, and it is implied that some of the disturbances are due to the interaction between fast flows and the background plasma. We also display a typical earthward flowing event and compare it with its tailward flowing counterpart, both of which co-existed with magnetic structures.
Bai Xi-Xiang
Fu Siqi
Pu Zhang
Sheng C.
Zheng Han-qing
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