The Spin of Earth's Inner Core May Be Changing, Scientists Say
EARTH, JUL 08 – Scientists report Earth’s rotation sped up by 1.66 milliseconds on July 5, 2024, marking the shortest day ever recorded with unknown causes continuing since 2020.
- On July 5, 2024, Earth experienced its quickest full spin ever recorded, completing a rotation 1.66 milliseconds sooner than the typical length of a day.
- This faster spin is linked to the moon moving farther from Earth's equator, changing its gravitational pull and allowing Earth to rotate slightly faster.
- In contrast, during northern summer when trees grow leaves, mass moves away from Earth's spin axis and this shift slows Earth's rotation like a skater extending their arms.
- Scientists predict Earth will spin faster again on July 9, July 22, and August 5, shortening days by 1.3 to 1.51 milliseconds, though these changes are too small to notice directly.
- These subtle variations in Earth's rotation affect critical systems like GPS, communication satellites, and power grids, highlighting the need to monitor precise timekeeping.
18 Articles
18 Articles
Earth is about to break its own speed record—here’s why
The Earth is pretty good at keeping its pace. However, variations do happen. And on three separate days this summer—July 9, July 22, and August 5—the Earth will spin notably faster than usual. Of course, you’re not likely to feel dizzy or notice the shift at all, but scientists are well aware of it. They say that over a 24-hour period, the Earth’s rotation will take a few milliseconds less than it usually does—about 1.3 to 1.51 milliseconds less…
Earth Is About to Start Spinning Faster. Here’s What That Means for Us.
Over the next few months, Earth is expected to spin slightly faster than usual, shaving off tiny slivers of time from our days. On July 9, July 22, and August 5, the planet’s rotation will speed up just enough to make each day between 1.3 and 1.51 milliseconds shorter than the standard 86,400 seconds, as Live Science reported. You won’t feel it. Your clocks won’t change. But the shift is real, and scientists say it’s due to the moon’s shifting g…
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