Humans have pumped so much groundwater that we have measurably shifted Earth's axis.
It's the kind of news that's not shocking and yet is totally shocking at the same time.
https://news.agu.org/press-release/weve-pumped-so-much-groundwater-that-weve-nudged-the-earths-spin #Earth #science
@coreyspowell Here is one that perturbed me more.
Once of the first big finds of space geodesy and Lageos gravity was post glacial rebound - the slow lowering of the oblateness (J2) of the Earth as the poles rise after the ice caps melted after the last ice age.
Now, in the last 20 years, this has _changed sign_ "likely due to changes in the rate of the global mass redistribution from melting of the glaciers and ice sheets"
https://ui.adsabs.harvard.edu/abs/2013JGRB..118..740C/abstract
https://academic.oup.com/gji/article/212/2/1218/4600516
@TMEubanks @coreyspowell thank you for making a comparison with something other than the accuracy of our best measuring instruments.
