That was a nice string of days showing a sunspot -- May 13-19 -- a whole week. Then it was gone, but a few days later on May 23, another Solar Cycle 24 sunspot emerged, this time in our Sun's southern hemisphere. But it was another of those phantom spots. This one actually emerged, and gave us a sunspot number of 13. For that one day it covered 30 10E-6 hemispheres. (10E-6, or 10 to the minus sixth power, is another way of expressing the fraction one-millionth). The next day it was gone.
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