Overview
- An X1.9 flare and an unusually fast coronal mass ejection reached Earth in about 25 hours, driving an S4 solar radiation storm and a G4 geomagnetic storm.
- Measurements included solar-wind speeds near 1,150 km/s, Kp at 9 and Dst below −235 nT, with auroras observed at unusually low latitudes in Europe and the U.S. Southwest.
- Mexico’s UNAM/SCIESMEX reported roughly 45 hours of ionospheric disturbance that produced intermittent radio and GPS degradation, with conditions now returning toward normal.
- Peru’s IGP recorded geomagnetic activity fluctuating between G1 and G4 and ionospheric irregularities over Jicamarca, and now reports a step down toward G3 and progressive weakening.
- NOAA/SWPC and national agencies warned of operational impacts to aviation, satellite operations, GNSS and space launches, urged operators to monitor alerts, and advised safe solar viewing only with certified filters.