NASA captured images of two massive sun solar flares this week, one was the biggest since at least 2008.

The first flare was seen at 6:15 a.m. EDT and the second, larger flare, peaked at 10:36 a.m. EDT Sept. 7, NASA reported. This makes five large flares spotted in the same region since Sept. 4.

When electromagnetic radiation from the sun erupts, lasting minutes to hours, solar flares become visible, according to the Space Weather Prediction Center. Flares give off radiation that cannot pass through Earth's atmosphere, but can affect radio and GPS signals, which is why some might have noticed a radio station go silent this week.

The effects of the flare could still be visible in the northern skies over the weekend. Those in high-latitude regions might be able to see auroras.

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