Solar flares measured around X1 — like the May 13 and 14 events — indicate strong flare intensity. An X10 flare is described as as a severe event, according to NOAA.

In May 2024, the largest solar flare since 2017 was detected, ranking at an X-8.7 magnitude. Then in 2025, a flare May 13 was classified as an X-1.2 , and another the next day was listed as an X-2.7 .

A blazing X2.7-class solar flare erupted from sunspot AR4087 early Tuesday, hurling a scorching wave of plasma and charged particles straight at Earth. NASA/SDO.

Stock image of an artist's illustration of a solar flare. There is a 25 percent chance of X-class solar flares between November 13 and 15, according to forecasters.

A high-powered solar flare erupted from the sun last week, causing a major radio blackout in Europe and Asia. The eruption happened at 3:25 a.m., meaning that the sun wasn't in the Texas sky at ...

The silouhettes of two people stood on a hill watching the northern lights (main) and the sun as seen by the GOES-16 satellite shortly after Monday's solar flare (inset).

Solar flares are classified based on their strength and fall into five designated categories: A, B, C, M and X. An X-class solar flare is the most intense type of solar flare and can produce as muc… ...

The biggest flare of the series, recorded at a M7.3, erupted from sunspot region AR3938 on Dec. 25 at 10:15 p,m. EST (0315 GMT on Dec. 26). Solar flares are ranked and categorized by their power ...

A powerful X2.7 solar flare, the strongest of 2025, could bring northern lights and disrupt radio and satellite signals. Sun unleashes strongest solar flare of 2025, sparks tech warning ...