Strange Sounds
Researchers from China have confirmed the existence of an approximately 8.5-year Inner Core Wobble (ICW) in both polar motion and length-of-day variations, revealing a static tilt of about 0.17 degrees between the Earth’s inner core and mantle, challenging traditional assumptions and providing insights into the Earth’s internal dynamics and density distribution.
The Earth’s inner core is a solid, dense sphere composed primarily of iron and nickel. Located beneath the liquid outer core, it spans a radius of about 1,200 kilometers (746 miles). This region plays a crucial role in Earth’s geophysical processes, influencing the planet’s magnetic field and contributing to the overall dynamics of the Earth’s interior.
Understanding the properties and behavior of the inner core is essential for unraveling mysteries related to Earth’s structure, seismic activity, and magnetic field.
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