In this paper we update a prediction of the solar activity for cycle 23 on the basis of a general framework derived from simple dynamo considerations. We estimate an expected maximum smoothed International Sunspot Number of 143+/-30, or a smoothed 2800 MHz radio flux (F10.7) of 190+/-30 x 10(-22) Watts/m(2)/Hz. These values should allow us to test the reliability of the various forecasting methods. [References: 13]
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