Got a bit sidetracked earlier in the month, this is overdue for an update. Earlier we reported that Hathaway had updated his solar cycle prediction saying “…the predicted size makes this the smallest sunspot cycle in about 100 years. “. April solar index numbers seem to support this prediction.
All three main solar indexes tracked by NOAA’s Space Weather Prediction Center are down in April.
First the sunspot number, down slightly.
Solar radio flux, down slightly, almost unchanged.
The solar geomagnetic field continues to try to get jump started, down 5 units since March.
- The sun is still in a funk: sunspot numbers are dropping when they should be rising (wattsupwiththat.com)
- NASA/Hathaway’s updated solar cycle prediction – smallest in 100 years (wattsupwiththat.com)
- Geomagnetic data reveal unusual nature of recent solar minimum (wattsupwiththat.com)
- Solar Update March 2012 (wattsupwiththat.com)