For several years the land has turned unusually fast, for that reason 2020 included the 28 shortest days since 1960 and 2021 is expected to be the shortest year in decades.
the land on average, it spins once every 86,000 400 seconds, which equates to 24 hours.
However these twists are not perfect. Before the year 2020 begins, the shortest day since 1973 was July 5, 2005, when the rotation took 1.0516 milliseconds less than 86,000 400 seconds.
Why does the Earth rotate faster?
This speed of rotation of the planet varies due to the complex movement of its molten core, oceans and atmosphere.
Scientists who monitor the speed of the land ensure that the trend of having shorter days will continue in 2021.
According to his calculations, an average day in 2021 will be 0.05 milliseconds less than 86,000 400 seconds.
Throughout the year, a lag of about 19 milliseconds will have accumulated.
To determine the length of a day, scientists at the IRISH they measure the exact speed of the Earth’s rotation by looking at the precise moments when a fixed star passes through a certain location in the sky every day.