Forecast update for activity cycle 23 from a dynamo‐based method

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±30×10−22 Watts/m²/Hz. These values should allow us to test the reliability of the various forecasting methods.