You know what, I might have been getting the 11 year cycle confused with the sun's sunspot cycle. I'm know the sun has an 11 year cycle relating to something. Whether it's sun spots or the radiation of higher levels of something or other (ions or something) that interact with the earth's Van Allen Belt, I'm not sure. Or maybe sunspots are related to aurora borealis activity. I'm not sure. But I do know that I saw them 11 years ago and this year -- both in very southerly locations -- Maine and northern N.Y.