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]
So then "Montreal and some other locations" probably had the best views of any densely populated areas to watch the Aurora: When power is out, light pollution is no longer a problem!
PJM:
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