> http://www.washingtonpost.com/blogs/capital-weather-gang/post/more-to-lig=
htning-than-meets-the-eye-and-camera-lens/2012/07/19/gJQAvgx8vW_blog.html


Impressive! It'd be really interesting to see the effects of the lightning
where it hit the ground. What sort of current was present where it hit the
ground? What did the current waveform look like? How was the current
distributed through the ground? Ground currents can cause considerable
transients on buried cables or differential voltages between ground rods
that are interconnected. What about induced voltages in nearby wiring?

Protecting equipment from lightning is quite a challenge. The telephone
industry has really done an amazing job. I was once talking with an
engineer at a radio transmitter site in Florida. During the conversation,
I heard a buzzing sound, then the phone dropped. A minute later he came
back and said he'd been thrown across the room by a shock from the phone.
The connection stayed up the whole time.

Impressive stuff!


Harold


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