MAKE A MEME View Large Image Magnetic Poles Movement.gif Variations in the Earth's Magnetic Field http //nationalatlas gov/articles/geology/a_geomag html four Courtesy of John Hillhouse USGS The intensity and structure of the Earth's magnetic field are always changing ...
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Keywords: Magnetic Poles Movement.gif Variations in the Earth's Magnetic Field http //nationalatlas gov/articles/geology/a_geomag html four Courtesy of John Hillhouse USGS The intensity and structure of the Earth's magnetic field are always changing slowly but erratically reflecting the influence of the flow of thermal currents within the iron core This variation is reflected in part by the wandering of the North and South Geomagnetic Poles Because a wide range of commercial and military navigation and attitude/heading systems are dependent on models of the magnetic field these models need to be updated periodically The magnetic field's strength and direction and their rates of change are predicted every 5 years for a 5-year period PD-USGov Earth's magnetic field
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