X5.1 solar flare, G4 geomagnetic storm watch

US power grid info:

PJM:

    Geomagnetic Disturbance Warning 
    11.11.2025 19:25 (PJM times are Eastern Standard).

    PJM-RTO

A Geomagnetic Disturbance Warning has been issued for 19:25 on 11.11.2025 through 04:00 on 11.12.2025 . A GMD warning of K7 or greater is in effect for this period.

This is only a warning. There are no listed actions being taken. When you see Geomagnetic Disturbance Action, not just Warning, there's a problem. That happened most recently on June 1, 2025. Extra people are probably on standby all night in case something happens.

CAISO: Nothing.

ERCOT: Nothing.

Hydro-Québec: Multiple snow-related outages near Montreal and some other locations.

Background info from the last time HN got wound up about this.[1]

[1] https://news.ycombinator.com/item?id=44152154