PROBLEMS OF GEOCOSMOS

Proceedings of the 7th International Conference "Problems of Geocosmos" (St. Petersburg, Russia, 26-30 May 2008)
50
40
30
20
10
0
< −Bx >, nT
� Σ = 200
� � �
Σ = 0
0 10 20 50 −x,RE 100
�
10
8
6
4
2
0
Σ = 0
Bz, nT
� �
Σ = 200
�
� � � �
0 10 20 50 −x,RE 100
Figure 3: Average magnetic field −Bx component in the Northern tail lobe (left) and Bz component
in the plasma sheet (right) for Σ = 0, 25, 50, 100, 200 S. Dots – data [4].
50
40
30
20
10
0
1
2
3
< −Bx >, nT
0 10 20 50 100
−x,RE
�
� � � �
10
8
6
4
2
0
1 2 3
� �
Bz, nT
0 10 20 50 100
−x,RE
�
� � � �
Figure 4: Average magnetic field −Bx component in the Northern tail lobe (left) and Bz component
in the plasma sheet (right) for Σ = 100 S – curves 2, which are repeated from Fig. 3. Flow to the
Earth up to Vx = 28 km/s in the near-Earth plasma sheet −7 RE > x > −32 RE is added – curves
3, or Ey = 50 kV /50 RE is added – curves 1. Dots – data [4]
References
[1] Cattell, C.A. (1996). Experimental evaluation of the Lundquist number for the Earth’s magnetopause
and magnetotail, J. Geophys. Res., 101, 27309-27316.
[2] Liperovsky V.A., and M.I. Pudovkin (1983). Anomalous resistivity and double layers in the
magnetospheric plasma. 181 pp., Publishing house ”Nauka”, Moscow.
[3] Nishida, A., T. Mukai, T. Yamamoto, S. Kokubun, and K. Maezava (1998). A unified model of
the magnetotail convection in geomagnetically quiet and active times, J. Geophys. Res., 103,
4409-4418.
[4] Slavin, J.A., E.J. Smith, D.G. Sibeck, D.N. Baker, R.D. Zwickl, and S.-I. Akasofu (1985). An
ISEE-3 study of average and substorm conditions in the distant magnetotail, J. Geophys. Res.,
90, 10875-10895.
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