MGmirkin wrote:(Terrestrial gamma-ray flashes)
http://sprg.ssl.berkeley.edu/%7Etohban/ ... icle_id=32
It seems that lightning and Terrestrial Gamma-ray Flashes are closely related in timing and proximity.
Terrestrial gamma-ray flashes (TGFs) are very brief bursts of gamma radiation (typically around 1 millisecond long) coming upwards from the Earth's atmosphere from somewhere in the vicinity of a thunderstorm.
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Hi Michael
This is wonderful stuff. First I heard of these.
I was aware that lightning was way more prevalent at certain places around the earth. These being the same, I think there is a way to look at it that makes some sense. First notices that the three places are fairly evenly spread, making a 4th harmonic of the Earth circumference (the 4th location is in the Pacific over sea and only shows up weakly).
The Schumann resonance frequency is ~7.6 Hz, and harmonics of this are generally observed especially up to about 6th order. The 4th harmonic is around 26 Hz I think
If you think about what happens when there is a big electrical discharge from a bolt of lightning, a circular wave goes out around the world and converges on the exact opposite point after about 66 ms. That energy then expands from that point and reconverges at the original location another 66 ms later. This sets of the next lightning bold zap. So lightning shows these clear zap-zap-zap effects at the Schumann resonance.
Now I liken this to the effects found in sonoluminescence or even in sonofusion (see
http://en.wikipedia.org/wiki/Bubble_fusion) where energy is concentrated to a point. Because the inverse square law is operating in reverse, you get this huge concentration of energy at a point. Zap!
I first discovered this effect for myself when studying standing waves in a cup of tea. When I jiggled the cup just right the waves converged with every increasing amplitude and sent a jet of hot tea into my eye!

After that I used my computer sound speakers and cold water to study this stuff.