FRIDAY THE 13TH GEOMAGNETIC STORM: Arriving earlier than expected, a CIR (co-rotating interaction region) hit Earth's magnetic field on June 13th, sparking a G2-class geomanetic storm. There is a chance that this ongoing storm could intensify to category G3 (Strong). CIRs are like mini-CMEs. They contain shock waves and enhanced magnetic fields that do a good job sparking auroras. Aurora alerts: SMS Text
