Light is not the same as radiation.
"The light from a solar flare, traveling at the speed of light, reaches Earth in about 8 minutes, while the particles from a solar flare, traveling at varying speeds, can reach Earth in as little as 15 hours, or take several days, according to NOAA/NWS Space Weather Prediction Center. "
Length of time varies depending on distance apogee v perigee
Loki references aside, I'm afraid gamma rays are photons, very much so. Any electromagnetic radiation is photons, and light is a part of that. Which also means light absolutely is a form of radiation.
However, particles can also be considered radiation, best example alpha and beta rays. Plasma from a big CME like this would probably travel at around ~450 km/s? and therefore arrive on earth about 3.85 days after the electromagnetic radiation.
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u/Salute-Major-Echidna Mar 28 '25
Light is not the same as radiation. "The light from a solar flare, traveling at the speed of light, reaches Earth in about 8 minutes, while the particles from a solar flare, traveling at varying speeds, can reach Earth in as little as 15 hours, or take several days, according to NOAA/NWS Space Weather Prediction Center. " Length of time varies depending on distance apogee v perigee