Science ❯ Earth Science ❯ Geophysics

Earth's Rotation

Factors Affecting Rotation Time Measurement Effects of Acceleration Core Dynamics Influences on Rotation Acceleration Timekeeping

Earth Sets Second-Shortest Day of 2025 as Spin Continues to Accelerate

Ruling out a 2025 leap second, international timekeepers prepare protocols for a possible negative adjustment by 2029.

New Projections Confirm Record-Short Days This July and August

Earth Could Set Shortest Day Record in July or August 2025