The difference is small but measurable. The reason is that the Earth is spinning faster. Scientists are looking into the cause and say the most likely explanation is the melting of mountain glaciers and polar ice caps. This melted ice flows into the ocean and is redistributed around the planet.
This change affects the speed of the Earth's rotation, much like an ice skater spins faster when he keeps his arms close to his body.
Scientists are still doing more research to confirm the cause and assess the potential, even small, impacts on precision-time systems like satellite navigation.
As of now, July 5, 2024 is the shortest day on record, falling 1.66 milliseconds short of the standard 24-hour period. Although the exact cause is unknown, scientists are studying the dynamics of the Earth’s interior, including the movement of molten metal in the outer core, ocean currents, and upper-level atmospheric winds.
Source: https://quangngaitv.vn/ngay-05-8-2025-la-mot-trong-nhung-ngay-ngan-nhat-lich-su-6505680.html
Comment (0)