CNN
• Ashley Strickland
X1.9 flare’s CME sparks S4 radiation storm and G4 geomagnetic storm — widespread satellite, GPS and HF impacts reported
On Jan. 19, 2026 an X1.9 solar flare’s coronal mass ejection struck Earth, producing an S4 radiation event—the strongest since 2003—and a G4 geomagnetic storm that generated aurora as far south as the United States. NOAA confirms ongoing satellite anomalies, GPS degradation, HF outages and potential power‑grid effects.
