Occurrence of Magnetospheric Flux Transfer Events During Substorm
- Joseph R. Kan,
- Thomas A. Potemra,
- Susumu Kokubun and
- Takesi Iijima
Published Online: 19 MAR 2013
Copyright 1991 by the American Geophysical Union.
How to Cite
Kawano, H. and Kokubun, S. (1991) Occurrence of Magnetospheric Flux Transfer Events During Substorm, in Magnetospheric Substorms (eds J. R. Kan, T. A. Potemra, S. Kokubun and T. Iijima), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM064p0409
- Published Online: 19 MAR 2013
- Published Print: 1 JAN 1991
Print ISBN: 9780875900308
Online ISBN: 9781118663981
- Magnetospheric substorms—Congresses
Transient variations in the magnetic field and plasma parameters, called flux transfer events (FTEs), have been detected in the magnetosheath and the magnetosphere near the magnetopause. FTEs have been interpreted to be generated by transient and patchy reconnection.
In this report, four series of recurring transient magnetic field variations identifiable as FTEs, observed with AMPTE/CCE in the outer magnetosphere, are studied in relation to substorm activities. Since AMPTE/CCE resides in the region of 8<L<9 for about 6 hours on each orbit, the spacecraft can continuously monitor the time-sequence of the events occurring near the magnetopause.
It is found that the transient variations are observed during the substorm growth phase and continue to occur during the substorm expansion phase until the spacecraft enters themagnetosheath. This time-sequence can be interpreted as follows: the southward turning of the interplanetary magnetic field starts the dayside merging, which generates FTEs near the dayside magnetosphere and initiates the growth phase of substorm in the magnetosphere.