Plot updated daily prior to 23UT
Latest SPWC 27DO.txt Message
These plots show forecasts for the 10.7cm solar radio flux (F10) and the planetary geomagnetic activity index (Ap) for the next 27 days (heavy solid lines). The light solid lines and filled circles at the start of each plot are the observed F10 and Ap for the past few days, and the light dashed lines show the observed F10 and Ap from the previous solar rotation. The three horizontal long-dash lines on the F10 plot indicate the mean (heavy line) and expected range (light lines below and above the heavy line) of F10 from the NOAA SWPC long-range prediction for Solar Cycle 23 (file predict.txt). The single horizontal dotted line is the 90-day mean F10 flux for the preceeding 90-day period.
The forecasts are a product of the NOAA Space Weather Prediction Center(SWPC). All questions regarding the veracity and validity of these predictions and the methodologies used in producing them should be directed to the NOAA/SWPC.
NOTE: This forecast is routinely updated by SWPC on a weekly basis (every Tuesday at around 21UT currently). A more up-to-date forecast can be found in the joint SWPC/USAF Report of Solar-Geophysical Activity (RSGA) issued daily around 22UT. This report contains a forecast of F10 and Ap for the next three days.
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