Internal structure of a magnetic flux rope from Cluster observations
Article first published online: 3 APR 2007
Copyright 2007 by the American Geophysical Union.
Geophysical Research Letters
Volume 34, Issue 7, April 2007
How to Cite
2007), Internal structure of a magnetic flux rope from Cluster observations, Geophys. Res. Lett., 34, L07102, doi:10.1029/2007GL029263., , , , , and (
- Issue published online: 3 APR 2007
- Article first published online: 3 APR 2007
- Manuscript Accepted: 1 MAR 2007
- Manuscript Revised: 7 FEB 2007
- Manuscript Received: 4 JAN 2007
- magnetic flux rope;
 We investigate a magnetic flux rope (MFR) observed by Cluster in the magnetotail during a substorm on 2001 August 22. The MFR was aligned with its principal axis closely along the dawn-dusk direction and had a small size of ∼2 RE with a total current of ∼0.8 MA. The four spacecraft traversed the MFR at different distances from its center based on the magnetic field signature. This fortuitous situation reveals the irregular magnetic field structure in its inner core, which is a feature reported here for the first time. At the leading edge, the y-component of the electric field was dawnward against the current density direction (dynamo action) and the x-component of the Lorentz force was Earthward. These parameters reversed in direction at its trailing edge (load).