Mildly Interesting

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Why do the cables ONLY vibrate between these two poles? (youtu.be)

submitted 8 months ago by [email protected] to c/mildlyinteresting

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I've seen this phenomenon many times over the years, while walking the dog out behind our house. The cables wiggle between these two particular power poles, but NOT between the adjacent poles (or any others, along this pole line). There is no wind, no earthquakes, no herds of animals or large vehicles/machinery anywhere nearby when this is happening. I honestly have no idea why this happens sometimes. Thoughts? I mean, sure, it's probably ghosts, right? But any other explanation would be appreciated...

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[–] shyguyblue 3 points 8 months ago

I immediately thought of the original Tacoma Narrows Bridge, which collapsed after wind caused a resonance to build up and literally shook itself apart: https://en.wikipedia.org/wiki/Tacoma_Narrows_Bridge_(1940)