Overview
- NOAA’s Space Weather Prediction Center confirmed severe G4 geomagnetic conditions on Nov. 12 with effects expected to extend into Nov. 13.
- Auroras were documented unusually far south, including in southern U.S. states, across Mexico, and in parts of Chile and Argentina.
- Forecasters warned that one or more additional coronal mass ejections could arrive over the next 24–72 hours and potentially strengthen the storm.
- Officials reported intermittent impacts to GPS, HF radio, satellites and elements of electrical grids, and advised infrastructure operators to stay on alert.
- UNAM’s SCIESMEX and other agencies emphasized technological risks but said the event poses no direct health danger to the general public.