Ben Richardson. Dr. Ben Richardson, look him up. He was the man who tied the sun's activity to our earth. As for the number of years, it's insane to get into an argument about the number of years since the last event. Just know the next event is very close at hand, Earth wise that is. One thing is for certain, this isn't humanity's first rodeo. Your DNA will remember the last one, after all, we're all from survivors of the cataclysm that hit the earth.