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Science: The world's day no longer lasts 24 hours

Science

Science: The world's day no longer lasts 24 hours


By TechThop Team

Posted on: 02 Aug, 2022

The Earth completed one spin in just 1.59 milliseconds short of the typical 24 hours on June 29, according to Time and Date and The Guardian.

The record comes as Earth has seen consistently shorter days in recent years due to the constant decrease in Sun's activity.

The Earth's spin has slowed down over time, causing days to become longer instead of shorter. Around 1.4 billion years ago, a day would last less than 19 hours.

As a result of daylight saving time, the International Telecommunication Union will sometimes add seconds to the world clock in June or December to make up for the longer days, most recently in 2016.

As The Guardian reported, the ITU is unlikely to add time during its next opportunity in December.

An Asia Oceania Geosciences Society meeting next week will be attended by Leonid Zotov, a professor of mathematics, who is expected to suggest the Chandler wobble can explain the recent trend of shorter days.

The Chandler wobble was first noticed in the late 1880s when astronomer Seth Carlo Chandler noticed that throughout 14 months the poles wobbled in different directions.

'At Earth's surface, the Chandler wobble's normal amplitude has been about three to four meters, but it disappeared from 2017 to 2020,' said Zotov, a scientist at Time and Date magazine.

A natural disaster, such as a hurricane or a weather storm such as an El Nino, can also have an impact on the speed at which the Earth spins, according to The Guardian.

During the earthquake that occurred in the Indian Ocean in 2004, nearly three microseconds were shaved off the length of the day.

source:albawaba

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