evidence: The last solar minimum, marking the end of solar cycle 24, took place in 2019. Solar cycle 24 was relatively quiet, as solar cycles go; the NOAA prediction was that solar cycle 25 would follow suit, with subdued activity, and a peak in July 2025. [...] In all, however, the evidence so far suggests that we need to be looking more closely at the Sun's magnetic activity, rather than just what's happening on the surface. The team's research has been published in the Monthly Notices of the Royal Astronomical Society Letters.