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[–] snacksmoto 0 points 3 points (+3|-0) ago 

The Earth's dimensions will also ripple as the gravity wave passes over. One experiment to detect and measure it is LIGO.

https://en.wikipedia.org/wiki/Gravitational-wave_observatory

https://en.wikipedia.org/wiki/LIGO

The basic concept is to take a laser, split the beam and send each down identically measured vacuum tunnels. The beam is then reflected back down the tunnel and, with extremely precise measurement, is measured against the other split beam. Any difference in the measurements of the split beams means that a change in gravity has affected one of the tunnels.

The problem is that the distance of the black holes colliding and the Earth are so great that the effect of the gravity wave is almost imperceptible to our current technology.

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[–] incoherence [S] ago 

Thanks for the info. So what exactly would the dimensions rippling look like? Would it be sort of like a massive earthquake type ripple, or more of a visual one, with less physical effect; more of just an alteration in the way we see things?

Side note - I guess there'd have to be some physical effect if gravity changed; things collapsing or floating off.