On the contrary, when the magnetosphere gets weaker on a multidecadal scale, the mid-latitude aurora forms more likely, and you may see some mid-latitude auroras even during the solar minima as Figure 2 shows.
«The present analysis indicates that the effective heat capacity of the world ocean pertinent to climate change on this multidecadal scale may be taken as 14 + / - 6 W yr m - 2 K - 1.