Radiation Explosion -- More powerful than our Sun

On December 27, 2004, the radiation from an explosion on the surface of SGR 1806-20 reached Earth.[2] In terms of gamma rays, the burst had an absolute magnitude around −291. It was the brightest event known to have been sighted on this planet from an origin outside our solar system. The gamma rays struck the ionosphere and created more ionization, which briefly expanded the ionosphere. The magnetar released more energy in one-tenth of a second (1.3×1039 J) than our sun has released in 100,000 years (4×1026 W × 3.2×1012 s = 1.3×1039