| definition |
- A measure of the magnetopause energy flux and an indicator of the solar wind power available
for subsequent magnetospheric energization. Defined as: V*B^2*l^2sin(theta/2)^4 where B is
the IMF, l is an empirical scaling parameter equal to 7 RE, and theta = tan(BY /BZ)^-1 the IMF
clock angle.
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