The sun is slumping – And headed even lower

Solar cycle 24 has seen very low solar activity, likely the lowest in 100 years.

When you look at the Ap Index from 1932 to 2017, you can see that the Sun’s magnetic output changed in 2004. Prior to that, there seemed to be a floor of activity at solar minima. In 2009 the Ap Index dropped far below that level, and has now dropped back to the previous floor. This even though Solar minimum is likely still three years away.

In a similar manner, the floor of activity for the F10.7 flux was presumed to be 64. However, the F10.7 flux shows that the Sun has declined from solar maximum to the current stage over the last 3½ years. Even though it is still presumably still three years to minimum, the Sun is now back to that level.

See several more graphs:
http://ift.tt/2r35ctr/

Thanks to Dean Koehler, Laurel and Heidii13 for this link

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June 7, 2017 at 09:12AM