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Geophysics

Earth's Rotation Earth Rotation Rotation of the Earth Seismology Seismic Waves Earth's Core Core Dynamics Core Structure Magnetism Geological Structures

Earth to Record Third-Shortest Day on Aug. 5 as Timekeepers Plan First Negative Leap Second

Rapid, unexplained shifts in Earth’s rotation are complicating coordination of global time standards.

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

Earth Logs 1.34-Millisecond Day, Its Second-Shortest on Record

Nearly 7,000 Dams Reoriented Earth’s Poles and Lowered Sea Levels

New Projections Confirm Record-Short Days This July and August

Earth's Spin Breaks Short-Day Records as Timekeepers Halt 2025 Leap Second

Three Record-Short Days Ahead as Earth’s Spin Accelerates

Earth Could Set Shortest Day Record in July or August 2025

NASA’s Perseverance Rover Captures Rare Dust Devil Interaction on Mars

New Model Reveals Layered Interiors of Uranus and Neptune

Earth’s Axis Shifted 31.5 Inches East Due to Groundwater Pumping, Study Finds

Earth's Inner Core Rotation Slows, Raising Scientific Questions

Discovery of Earth's Ancient Magnetic Field in Greenland Rocks Reveals New Insights

Global Timekeeping Faces Unprecedented Challenge Due to Earth's Accelerating Spin

Global Warming May Delay Introduction of First-Ever Negative Leap Second

Gigantic Seamounts Discovered in Pacific Ocean