1945, 1, 1945 - the white center is the hypocenter which is blinding, the black around that is fire and the main blast then there is less black meaning there is less fire but other gases that are evil and evaporate people (with the fire). then the next black bit is the shock or pulse like an earthquakes pulse, then on the outside it is spreaded radiation.
fijian, did you pay no attention to this flash? if it is too easy (the game) then why didnt you change the settings to harder. oh wait, you were just saying that it was easy so people would think your really good at gaming - thats pathetic.