Generally speaking, Solar Cycle 24’s April sunspots numbers, F10.7cm flux and the geomagnetic field Ap index all indicate reduced solar actively. NASA as well most of the experts in this field agree that Solar Cycle 24 will be a record setter of a sort—least active in about 100 years. One need not base this on computer models or some consensus, however. All that is required is to look at the data. I do not think anyone has a handle on why Cycle 24 is acting this way. There are many theories and perhaps one of them is correct. Will Cycle 25 continue this downward trend? Click on the charts to improve clarity.
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