The last event comparable to this occurred in mid-December when the sun emitted an X2-class solar flare. Astronomers deem the latest X5 class, signifying it was several dozen times stronger.

X-class flares are the strongest class of solar flare, which are ranked on a 4-class scale. With each increase in class on the scale, the power of the flare also goes up ten times in strength.

A powerful solar flare unleashed by the Sun on Sunday caused a radio blackout across parts of the Pacific Ocean, the US National Oceanic and Atmospheric Administration said. At such a critical moment ...

MOSCOW, November 1. /TASS/. Scientists have registered a solar flare of the most powerful X-class in the early hours of Friday, Russia’s Fedorov Institute of Applied Geophysics has told TASS.

From X-class solar flares to coronal mass ejections – all the energy that the Sun releases has terrible effects on our planet. That’s why it has become essential to find a way to choreograph ...

Well, that’s a bit dramatic (it explodes a lot) — but a particularly large sunspot named AR2781 produced a C5-class solar flare which is a medium-sized explosion even for the Sun. Flares range ...