Defying the odds for so late in a sunspot cycle, another solar sunspot maximum was set last month. (informthepundits.wordpress.com)
There is an excess of H and K emission in the faculae which surround sunspots, and epochs of sunspot maximum coincide with epochs of maximum H and K. (stsci.edu)
The previous sunspot maximum was in 2014, so the winters of 2015 — 2017 are excellent time for auroras. (en.ilmatieteenlaitos.fi)