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UT1 is determined using very long baseline interferometry (VLBI), a technique that relies on signals from extremely distant quasars to measure Earth’s precise orientation in space. In 1972 a policy to add a small unit of time, called a leap second, to UTC was implemented to correct the minute discrepancies found using such precise measurements.
The massive 8.8 earthquake that ...,
hit Chile Saturday and should have shortened the length of an Earth day by 1.26 microseconds
Strong earthquakes have altered Earth's days and its axis in the past. The 9.1 Sumatran earthquake in 2004, which set off a deadly tsunami, should have shortened Earth's days by 6.8 microseconds and shifted its axis by about 2.76 inches (7 cm, or 2.32 milliarcseconds).
space . com / Chile Earthquake May Have Shortened Days on Earth
If we knew the answer it would be in the article, but it's got something to do with water distribution is my guess. There are many possible things going on with water, but let's start with the favorite ATS conspiracy topic, fracking:
originally posted by: largo
Scarce groundwater supplies also are being used for energy. A recent study from CERES, an organization that advocates sustainable business practices, indicated that competition for water by hydraulic fracturing—a water-intensive drilling process for oil and gas known as "fracking"—already occurs in dry regions of the United States. The February report said that more than half of all fracking wells in the U.S. are being drilled in regions experiencing drought, and that more than one-third of the wells are in regions suffering groundwater depletion.
A 2013 study of 40 aquifers across the United States by the U.S. Geological Survey reports that the rate of groundwater depletion has increased dramatically since 2000,
Joshua’s Long Day around the World?
Having concluded that Joshua’s long day is a miracle, we may ask whether or not it was restricted just to the area of Canaan or whether it was global in scope. Certainly a “missing day” would generate considerable consternation among the peoples of the world, provided it was a global event. Are there other accounts of a long day or even a long night? Indeed, we can find stories of a long night as well as a long day. We can even find tales where the sun hung near the horizon for a long time. All the accounts taken together allow us to ascertain the time of day when Joshua told the sun to stand still.
Some of the world’s recitations of Joshua’s long day are vague and unspecific while others are quite clear. Among the former are those which relate only that the people had knowledge of the concept that the sun, moon, and stars can reverse their motions. An example of one of these is the account referred to by Augustine in The City of God where he quotes the Æneid about a witch who:
...can reverse the wheeling of the planets, halt rivers in their flowing.22
Why Does The Earth's Rotation Rate Vary?
There was no sudden change in the population around 2000, it's been increasing gradually, which doesn't follow this pattern:
originally posted by: Autorico
Could the weight of 7 billion people have anything to do with it?
originally posted by: abeverage
Ok so I found it very interesting that we have been slowing down more slowly if this is only the 4th leap second added since 1999...
Interesting also that this occurred during the alignment of Jupiter and Venus not seen for 2,000 years...
Purely coincidence I am sure, but I find that interesting.