Earth just experienced a rare S4 solar radiation storm, the most intense since 2003 — powerful for satellites and astronauts, ...
NOAA's Space Weather Prediction Center classified the storm as S4 (severe).
Global mean downward surface shortwave radiation (DSSR) changes. (A) temporal evolution and (B) trends of DSSR during the historical period (1959-2014) simulated by the model; (C) contribution of ...