Overview

• USC scientists confirmed the inner core's slowdown using seismic data from earthquakes and nuclear tests.
• The inner core, a solid iron-nickel sphere, is now moving slower than the Earth's surface for the first time in decades.
• Researchers suggest the slowdown may be linked to dynamics in the liquid outer core and gravitational forces from the mantle.
• The implications for Earth's surface are minimal, possibly altering the length of a day by thousandths of a second.
• Future studies aim to further understand the inner core's behavior and its impact on Earth's dynamics.