The Day Earth Survived Its Greatest Space-Ray Attack --Ever

It came suddenly from the distant reaches of the Constellation Sagittarius, some 50,000 light years away. For a brief instant, a couple of tenths of a second, on December 27, 2004 an invisible burst of energy the equivalent of half a million years of sunlight shone on Earth. Many orbiting satellites electronics were zapped and the Earth's upper atmosphere was amazingly ionized from a massive hit of gamma ray energy.

Read More: http://www.dailygalaxy.com/my_weblog/2011/12/december-27-2004-the-day-earth-survived-its-greatest-stellar-attack-ever.html