A December eruption pushes Earth into magnetic turbulence.

Space weather forecasters watched a full-halo coronal mass ejection rush toward Earth after erupting from sunspot AR4299 on December 6. Hours later, NOAA issued a G3 geomagnetic storm watch, signaling that the incoming magnetic cloud had the potential to distort satellite paths, weaken radio communication and ignite auroras normally confined to the far north. November’s storms already showed how unstable this solar cycle has become. Now December arrives with another surge, and the timing could not be more intense.



