GREENBELT, Md., Nov. 13 (UPI) -- NASA said the sun emitted a mid-level M-Class solar flare Tuesday, an example of the weakest flares that can still cause some space weather effects near Earth.
While radiation from a flare cannot pass through Earth's atmosphere to affect humans on the ground, if intense enough they can disturb the atmosphere in the layer where global positioning system and communications signals travel, the space agency said.