A straightforward estimation of the maximum sunspot number for cycle 23 |
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| Authors: | B Mendoza J Ramírez |
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| Institution: | (1) Insituto de Geofisica UNAM, Ciudad Universitaria, 04510 México D.F., Mexico |
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| Abstract: | Using the annual number of geomagnetically quiet days (aa < 20 γ) for the year after the solar minimum, this precursor method predicts that the maximum sunspot number for cycle 23 will be 140 + 32, indicating that cycle 23 will be similar to cycles 21 and 22. |
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| Keywords: | Solar physics astrophysics and astronomy (magnetic fields general) |
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