A recent study published in Science Advances has revealed a remarkable new structure within Earth’s outer core: a ring-like, doughnut-shaped region. This discovery could provide crucial insights into the dynamics of Earth’s magnetic field and its core.
Seismic Waves Reveal Hidden Doughnut Shape
Researchers, including Prof. Hrvoje Tkalčić from Australian National University, have used seismic waves from large earthquakes to explore Earth’s outer core. By analyzing how these waves slow down as they pass through certain regions, they identified a torus-shaped structure within the molten metal, akin to a giant doughnut.
Importance of Understanding Earth’s Outer Core
The outer core, composed of swirling molten iron and nickel, is vital for sustaining Earth’s magnetic field. This magnetic field protects our planet from harmful solar radiation and plays a key role in the survival of life at the surface. Tkalčić highlighted that understanding this region is essential as it impacts the planet’s overall dynamics.
Mysteries and Future Research
While the discovery of this new structure is groundbreaking, many questions remain unanswered. The exact thickness of the doughnut-shaped zone is still unknown, and its composition might include lighter elements like silicon or sulfur. Dr. Xiaolong Ma emphasized that although this finding lifts some of the mysteries surrounding Earth’s outer core, many aspects of this enigmatic region are yet to be explored.
