June Solar Update

by David Archibald, July 6, 2018 in WUWT

We have only 300 years-odd of detailed solar observations with telescopes, half that of magnetic records, half again in the radio spectrum and less than that for most modern instrument records (and 12 years of Watts Up With That to interpret it). So as the months pass our knowledge of solar activity is still growing appreciably. The evidence points to a major transition of activity in 2006 which has returned us to the solar conditions of the 19thcentury. 19th century-type climate is expected to follow.

Figure 1: F10.7 Flux 1948 to 2018