Cluster: Quasi-periodic Impulsive Signatures on the Dayside Magnetopause

Details Cluster: Quasi-periodic Impulsive Signatures on the Dayside Magnetopause Cluster: Quasi-periodic Impulsive Signatures on the Dayside Magnetopause

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm22a0789t&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM22A-0789

Physics

2724 Magnetopause, Cusp, And Boundary Layers, 2731 Magnetosphere: Outer

Scientific paper

We report on an event observed by the 4 Cluster spacecraft in the northern polar cusp. During an interval of about 35 minutes, multiple field reversals of approximately 1-minute duration with an approximate 8-minute recurrence time were observed. The individual structures do not resemble low latitude FTEs [Russell and Elphic, 1979] but the 8-minute recurrence frequency suggests that an intermittent reconnection process of the sort that has been proposed by Southwood et al. [1988] and by Scholer [1988] may be occurring. Measurements (appropriately lagged) of the solar wind at ACE show that the field was southward-oriented and that a dynamic pressure increase occurred as this event started. The observations will be discussed both in the context of pressure pulses [Sibeck et al., 1989] and flux transfer events (FTE).

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