[Spirochete]

In many pics of Atomic explosions, what are those white streaks you often see near the ‘Mushroom Cloud’ that appear to be going up and down from the ground to the sky? (anyone know?) They almost appear to be from a secondary explosion of some sort from within the bomb itself.

The exhaust plumes from a salvo of sounding rockets, used to collect data from the blast.

[KoRn]

Thanks for the explanation/information.