User blog comment:James12708/Reapers VS. Forerunners VS. Angels from Darksiders VS. Humanity from Halo VS. Council and humanity from Mass Effect VS. Imperium of Man/@comment-4721065-20130112104250/@comment-1683193-20130119081139

Range is also sometimes used as a term for yield. Anyway,the exlplosion had a blast radius of 311km which comes to around 5 teratons.