Brangdon,

"Low-yield" here means in the 0.1 - 10 kiloton range that a terrorist might improvise, rather than the megatons a serious government could muster.

Really makes little difference, except on the distance from each required to avoid the initial heat and the time available to hide (longer from the larger blast).

AFLM,

The thermal flash from a ground blast (see original post) of low yield, will not provide a thermal blast that is a problem for very far. Buildings, terrain, trees,etc. will block the thermal effects at distances much beyond the serious damage zone. An air burst would provide a different problem.

Respetfully,

Jerry