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Fast Magnetic Field Changes
A German-French team of geophysicists has discovered that fast changes in the Earth's magnetic field display close correlation with variations in the Earth's gravity. They used magnetic field data from the CHAMP satellite operated by the Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences and highly accurate measurements of the Earth's gravitational field provided by the GRACE mission, which involves the GFZ in a leading role. The Earth's magnetic field protects us from cosmic radiation. Changes in the magnetic field are indicated also by tiny changes in the Earth's gravity, which are caused by shifts in its mass resulting from convection currents in the Earth's core.
