From: Energetic ion acceleration during magnetic reconnection in the Earth’s magnetotail
L (m)
V A (m s −1)
B (T)
R
E R (V/m)
e ϕ (eV)
Earth’s magnetotail
10 8
10 6
10 −8
0.1
10 −3
10 5
Solar corona
10 −2
10 3
10 11