Bad idea for a scifi story:
In 1860, a paranormal investigator discovers that there's a sun-worshiping cult that sacrifices a virgin to The Sun every year. It turns out last year, they messed up the ritual, and the victim escaped at the last moment.
Cue the Carrington event. A massive geomagnetic storm that caused auroras as far south as Colombia.
The investigator is then paid to infiltrate the cult and disrupt their ritual every time, as it saves Western Union a lot on electrical costs.