Anatomy of a flux transfer event seen by Cluster | Zendy

Sonnerup B. U. Ö. | Zendy; Hasegawa H. | Zendy; Paschmann G. | Zendy

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Anatomy of a flux transfer event seen by Cluster

Author(s) -

Sonnerup B. U. Ö.,

Hasegawa H.,

Paschmann G.

Publication year - 2004

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/2004gl020134

Subject(s) - magnetopause , flux (metallurgy) , physics , rope , magnetic reconnection , event (particle physics) , cusp (singularity) , geophysics , spacecraft , current sheet , cluster (spacecraft) , astrophysics , magnetic field , magnetohydrodynamics , magnetosphere , geometry , astronomy , computer science , mathematics , materials science , metallurgy , algorithm , quantum mechanics , programming language

Data from Cluster are used to study the structure of a flux transfer event (FTE), seen near the northern cusp. We employ Grad‐Shafranov reconstruction, using measured fields from all four spacecraft to produce a map of the FTE cross section. The FTE consists of a flux rope of approximate size 1 R E and irregular shape, embedded in the magnetopause. Its axis is tangential to the magnetopause. Since no reconnection signatures are seen, the map provides a fossil record of the prior reconnection process that created the flux rope: the strong core field indicates that it was generated by component merging. An average reconnection electric field ≥0.18 mV/m must have occurred in the burst of reconnection that created the FTE. The total axial () current and magnetic flux in the FTE were −0.66 MAmp and +2.07 MWeber, respectively.

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