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Originally posted by Notme
I have heard through the news that the Earths Rotation Rate was slightly affected by the recent earth quake.
Would the Gravity Probe B spacecraft be able to measure this change? Or could the change effect the Gravity Probe B test results?
It is testing two effects:
1) the geodetic effect--the amount by which the Earth warps local spacetime in which it resides, and
2) the frame-dragging effect--the amount by which the rotating Earth drags local spacetime around with it.
More info about the probe is here: