Earth Records Shortest Day Ever

Earth marked its shortest day on July 29 as it completed a full spin 1.59 milliseconds less than its standard 24-hour rotation.

Earth generally takes a 24-hour period to complete one rotation.

The Earth’s last record for its shortest day was on July 19, 2020, when Earth completed its rotation in 1.47 milliseconds under 24 hours, becoming the shortest month ever recorded since the 1960s.

Scientists believe that the cause of the varying rotational speed of Earth could be the processes in the inner or outer layers of the core, oceans, tides, or even climate change.

However, researchers believe this could be related to the movement of Earth’s geographic poles across its surface, known as the “Chandler wobble,” which is described as the quiver seen when a spinning top begins gaining momentum or slows down.


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