Images from NASA's Solar Dynamic Observatory (SDO) show it was a busy week on the surface of the sun.<br/> <br />It began began with an explosive mid-level flare that erupted last Sunday (August 24). The sun continued to unleash over half a dozen more flares within the next two days.<br/> <br />The SDO captured images of the flares, which erupted from a sunspot is known as AR2151.<br/> <br />Solar flares are powerful bursts of radiation.<br/> <br />Harmful radiation from a flare cannot pass through Earth's atmosphere to physically affect humans on the ground.<br/> <br />However -- when intense enough -- they can disturb the atmosphere in the layer where GPS and communications signals travel.
