The World Magnetic Model, crucial for navigation, has been updated to predict the future shifts of Earth's magnetic field.
On December 17th, the National Centers for Environmental Information (NCEI) and the British Geological Survey (BGS) released an updated version of the World Magnetic Model, predicting the shifts and changes of Earth 's magnetic field over the next five years. This model predicts the difference between magnetic north and true north at every point on Earth . It plays a crucial role in satellite and aircraft navigation and helps smartphone users orient themselves using services like Google Maps.
The update, planned for years, might not be noticeable to most users. However, it's essential to maintain accurate navigational systems and improve future predictions about Earth's magnetic field. Earth's main magnetic field originates in its outer core, a layer of molten iron thousands of miles below the surface. The electrically conductive liquid iron is constantly in motion, generating an electric current when it moves through an existing weak magnetic field. This electric current creates its own magnetic field, sustaining a process called the geodynamo. This geodynamo has regenerated Earth's magnetic field for billions of years. Without this continuous regeneration, Earth would have lost its magnetic field within about 40,000 years
MAGNETIC FIELD NAVIGATION EARTH GEODYNAMO SCIENCE
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