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Earth's Inner Core Slows, Potentially Alters Magnetic Field

9/5/2025

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Summary

Story summary

Studies show the Earth's inner core, made of iron-nickel alloy, is slowing and reversing its rotation.
USC research analyzed seismic data from 1991 to 2023, revealing changes in core rotation after 40 years.
The inner core's movement influences the Earth's magnetic field, crucial for protecting the atmosphere from solar radiation.
Current technology limits our understanding of the core, indicating its complex behavior.

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Story summary

Studies show the Earth's inner core, made of iron-nickel alloy, is slowing and reversing its rotation.
USC research analyzed seismic data from 1991 to 2023, revealing changes in core rotation after 40 years.
The inner core's movement influences the Earth's magnetic field, crucial for protecting the atmosphere from solar radiation.
Current technology limits our understanding of the core, indicating its complex behavior.