HIGHLIGHTS
SUMMARY
When the supersonic and super-Alfvénic solar wind encounters the Earth`s magnetic_field, it abruptly slows and becomes subsonic, creating the bow shock. Both the solar wind plasma and the interplanetary magnetic_field are compressed across the shock. This compression of the ⃗ and therefore, by Ampere`s law, a current flows on magnetic_field is associated with a curl of B the shock. The magnetopause is an obvious place for the bow shock current to close, but various studies have used global MHD simulations to investigate the question and found that the Chapman-Ferraro current . . .
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