Solar flares are flashes of ultraviolet and X-ray radiation released from active areas of the sun's surface, usually sunspots. They are classed by power on a scale of A, B, C, M, and X-class, where X ...
CHARLOTTE, USA - MAY 10: A view of an unusual sun activity created a sunspot, that is responsible ... [+] for a G4 Geostorm on Earth, the last time this magnitude happened was 20 years ago in ...
A GIANT sunspot, easily visible to the naked eye, is crossing the sun's disk in latitude 17° north from October 5 until 18, the time of central meridian passage being October 11.9. The area of ...