Collisionless Reconnection at Dayside Magnetopause and in the 
Magnetotail:  GEOTAIL and CLUSTER Observations

X. H. Deng (Radio Science Center for Space and Atmosphere, Kyoto University /
School of Electronics and Information, Wuhan University, P. R. China)
Matsumoto H., Kojima H., Baumjohann, W., Pickett J. S., Nakamura R.,
Gurnett D. A., Fazakerley, A. N.

By combining the data of plasma, magnetic field, particles and waves, we 
studied the structure of reconnection layer and the characteristics of waves 
and wave-particle interactions associated with reconnection at dayside 
magnetopause and in the magnetotail. We revealed the inherent correlation 
between reconnection and the enhancement of wave activity and the flux increase
of accelerated particles. We will report GEOTAIL encounter of an active 
reconnection diffusion region around the x-line in the Earth's magnetotail; 
We observed the Electrostatic Solitary Waves (ESW) and Narrow Electrostatic 
Noises (NEN) associated with reconnection at dayside magnetopause boundary 
and in the magnetotail region by both Geotail and Cluster II.
The data from the Cluster mission allows, for the first time, to 
unambiguously separate spatial from temporal effects. We have studied the 
3-D microphysics of magnetic reconnection and the 
dynamics of current sheet by the conjunction of Cluster II and ISTP satellites.