Rotation Speed of Earth's Core Slowing Down and Starting to Reverse Direction, Scientists Reveal Its Impact

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The Rotation Speed of Earth's Core Slows Down until It Begins to Change Direction, Scientists Reveal Its Impact

Dream - A study conducted by scientists from the University of Southern California found that the rotation of the Earth's core has been experiencing a decrease in speed, or slowdown, since 2010. Its movement has become slower compared to the Earth's surface.

Rotation Speed of Earth's Core Slowing Down and Starting to Reverse Direction, Scientists Reveal Its Impact

As is known, the composition of the Earth is more complex than we thought and continues to undergo changes every day. The Earth itself consists of three different layers, namely the crust, mantle, and core. Some theories suggest that the Earth's core rotates independently from the planet's own rotation. Recent research indicates that the rotation speed of the Earth's core has undergone a dramatic slowdown and even reversed direction.

"Solid Metal Ball that is Very Hot"

Need to know, the Earth's core is the hottest part of our planet. Its temperature is equivalent to the surface of the Sun. Very hot indeed. Located approximately 5,180 kilometers below the Earth's surface.

The Earth's core is mostly made up of iron and nickel. Meanwhile, the inner core of the Earth is surrounded by an outer core made up of liquid metal, which acts as a barrier from the other parts of the Earth. The core of the Earth is shaped like a solid metal ball that is very hot. The presence of this barrier allows the Earth's core to rotate independently and not always in line with the other layers of the Earth.

"Slowing down of Earth's Core Rotation"

Humans have known about the Core of the Earth since a Danish seismologist, Inge Lehmann, discovered it in 1936. Since then, scientists have continued to debate its speed and direction of rotation.

Quoting the Live Mint page, one of the reasons for the limitation of scientific evidence is the difficulty in observing or collecting samples directly from the Earth's interior. Most research and analysis are based on variations in seismic waves passing through the core at different times with similar strength.

The Speed of Earth's Core Rotation is Decreasing.

Data seismogram from earthquakes and repeated explosions indicate that the solid inner core rotation speed within the Earth has decreased compared to the Earth's surface over the past few years. This finding was published in the journal Nature in June 2024.

The research not only confirms the slowing down of Earth's core rotation, but also supports the claims made by scientists in 2023 that this slowdown is part of a long-term pattern involving periods of deceleration and acceleration over several decades.

"Start Moving in the Opposite Direction"

The proposed model in 2023 depicts the patterns of speed and direction of Earth's core rotation. This model suggests that the Earth's core used to rotate faster than the Earth's crust, but now it rotates slower. At one point, the rotation of the core and the Earth were aligned. However, the speed of Earth's core rotation gradually decreased until it eventually started moving in the opposite direction.

According to the statement of the Dean of the Earth Sciences Professor at Dornsife College of Letters, Arts and Sciences, University of Southern California, Dr. John Vidale, the discovery regarding the decrease in the rotation speed of the Earth's core confirms that changes in rotation speed follow a 70-year cycle. "This new finding also confirms that changes in rotation speed follow a 70-year cycle," said Dr. John Vidale, who is a co-author of the study.

"The Influence on Earth"

Dr. John Vidale stated that the slowing down and change in direction of the Earth's core rotation can affect the duration of one day by a fraction of a second. If the Earth's core rotation continues to slow down, its gravitational pull will cause the Earth's outer layers to rotate slightly slower. Ultimately, this can alter the duration of a day on Earth. However, these changes are very difficult to notice. According to Vidale, the impact will not even require humans to adjust their clocks or calendars to accommodate these differences, especially if the changes are only temporary.

In addition, the frequency of Earth's core slowdown is not yet known for certain. Scientists do not know exactly how often the Earth's core experiences slowdowns. However, there is a possibility that its rotation undergoes repeated acceleration and deceleration. These changes may occur over several decades. Therefore, more comprehensive data is needed to understand what may happen in the future.

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