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Among the shocking effects: A current known as the equatorial electrojet, which normally runs west to east in the ionosphere, reversed direction, she said.

Space Weather Creates Electrical 'Bermuda Triangles': Even a mild shock wave in the solar wind can suddenly amp up the equatorial electrojet and create localized magnetic storms. 

This result has significant implications for the many countries located beneath the equatorial electrojet that may be operating power infrastructure not initially designed to cope with space weather.

This daily contrast corresponds to the well-known variations in the equatorial electrojet.

It’s strong evidence that the equatorial electrojet is amplifying the geomagnetically induced current activity during interplanetary shock arrivals in a way that hasn’t really been recognized until now.