Australia moves 2.7 inches a year because of its position on a remarkably active tectonic plate. The country has issued a reset of its official coordinates four times in the past 50 years and will issue a fifth at the end of the year.
The next adjustment, due at the end of the year, will be about 1.5 meters (4.9 feet).
-- New York Times, via Walt Hickey in Significant Digits, FiveThirtyEight.com, 13 October 2016
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