An unexpected solar storm just struck Earth at 372 miles a second - HT Tech

Though the pictures of the beautiful auroras had been taken all over the internet, space weather experts classified it as a G2 class solar storm.

According to the National Oceanic and Atmospheric Administration (NOAA) Space Weather Prediction Center (SWPC), a G2-Class storm is a moderate one as the strength of G1 class storm is Minor while G5 class is said to be extreme.

As per SWPC, these storms occur as frequently as 600 times in a solar cycle that lasts 11 years.