Quote:
Originally Posted by Astroman
its said 3 seconds to a KM but in real life this can be affected by atmospheric conditions ie.. wind, dust, rain etc... Sometimes strikes dont produce a definate beginning and end so it is hard to judge. I have also encountered thunderless lightning, where the sound does not reach the observer at all, due to various reasons I have no idea on  |
Sometimes that can be due to just prevailing winds and distance (where the wind is passing from you towards the lightning) but most time it is truly "soundless" is due to air temperature or density gradients that curve the sound waves up away from the surface. (The opposite effect to temperature inversions that let you listen to normal conversations across a still lake some kilometres away... Tuggerah Lakes is great for that!)
Al.