Inner Core Gravity Competition Alters Earth's Rotation

A new study reports that a competition between the gravity of Earth’s inner core and other forces in the mantle is altering the planet’s rotation. The research highlights a gravitational battle within the Earth that is influencing the length of days.

The interaction between the inner core’s gravitational pull and mantle dynamics is identified as the mechanism driving changes in Earth’s rotational speed, leading to measurable variations in day length. The competition between these internal forces is directly linked to the observed alteration of the planet’s rotation.