Sunspot Now Biggest in 10 Years
Sunspot AR9393 is now the largest in ten years and is growing fast. The sunspot is presently thirteen times the size of earth. An eruption near the sunspot sent a coronal mass ejection toward earth earlier today. Forecasters estimate a 15 to 25% chance of a severe geomagnetic storm when the material reaches earth, probably on Friday.
The number of sunspots has reached 352, up from 224 earlier today.
The last time a magnetic storm caused severe damage was the memorable March 13, 1989 event, which shut down power grids and blew out huge transformers throughout the northern hemisphere.
read more