 But the computer modeling was actually done on a storm, a 1921 great geomagnetic storm that's 50% weaker than the 1859 one, because that's estimated to be more like a 100-year storm, and the 1859 one might be a 500-year storm. Well, the interesting thing is that just in July of 2012, there was a CME, a coronal mass ejection, that launched out from the sun, and it headed south.