Earth's magnetic field was struck by a "severe" solar storm Monday (Jan. 19), triggering vibrant auroras in the U.S. and ...
X1.9-rated solar flare erupted from sunspot 4341 on January 18, causing R-3 radio blackouts.
NASA's Interface Region Imaging Spectrograph (IRIS) mission captured an X1.1-class solar flare. See time-lapse footage of the blast that caused "a strong shortwave radio blackout over South America," ...