One of the more likely black swan events that has the potential to cause global upheaval. Quite a bit of data now from other solar systems in terms of likelihood of these events. So far it looks like it is slightly more likely to occur in the ramp up stage of a cycle, not at the very peak.
We would most likely see a very large sunspot(s) days before the event and have 10-15 hours to take action, decoupling transformers etc, but the effects would be massive nonetheless.
Seems to me a search for alien artefacts should have more focus. SETA vs SETI. Eg probes in solar or trojan orbit in our system.. We have had our own stuff out to earths lagrange points, but not looked for stuff as far as I can tell.
Earth probably looked pretty interesting a billion or two years ago so plenty of reason to send a simple probe sometime between then and now.