Geomagnetic Storm

[Mugwump]

Warnings were issued by the operator of the biggest power grid in the US, PJM Interconnection LLC, as well as by Midcontinent Independent System Operator, which manages high-voltage power lines across North America, reports Bloomberg.

These were the result of US Space Weather Prediction Center raising a 'serious' G3 level storm alert, though the alert was later downgraded to a less severe G2 storm.

'Voltage corrections may be required, false alarms triggered on some protection devices', said the U.S. Space Weather Prediction Center.

'Drag may increase on low-Earth-orbit satellites, and corrections may be needed for orientation problems'.

The 'moderate' G2 warning remains in affect today.