From Universe Today;
As you read this, a huge cloud of charged solar particles is speeding toward our planet, a coronal mass ejection resulting from the X1.4-class flare that erupted from sunspot 1520 on July 12. The CME is expected to collide with Earth’s magnetic field on Saturday, potentially affecting satellite operations and tripping alarms on power grids, as well as boosting auroral activity. It’s on its way, and all we can do is wait. (Thank goodness for magnetospheres!)
Actually, the effects from the incoming CME aren’t expected to be anything particularly dramatic. NOAA is predicting a geomagnetic storm level raging from G2 to G4, which although ranges from “moderate” to “severe” a G2 (Kp = 6) is most likely, according to Dr. C. Alex Young from NASA’s Goddard Space Flight Center.