{"id":33187,"date":"2012-10-26T19:23:27","date_gmt":"2012-10-26T23:23:27","guid":{"rendered":"http:\/\/planetsave.com\/?p=33187"},"modified":"2012-10-26T19:23:27","modified_gmt":"2012-10-26T23:23:27","slug":"the-magnetic-field-and-gravity-from-a-satellite-perspective","status":"publish","type":"post","link":"https:\/\/planetsave.com\/articles\/the-magnetic-field-and-gravity-from-a-satellite-perspective\/","title":{"rendered":"Magnetic Field And Gravity Intimately Linked"},"content":{"rendered":"

 
\nShort-term changes in the Earth’s magnetic field<\/a>\u00a0that occur over periods of just years or decades have now been shown in new research to have a very close relationship with changes in gravity. The research focused on a specific area, stretching from the Atlantic to the Indian Ocean<\/a>. In this area, changes in the magnetic field correlate very closely with variations in gravity. The researchers concluded that this means that processes occurring in the outer core have an influence on gravity.<\/p>\n

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The primary field of the Earth’s magnetic field is created by the swirling masses of liquid iron that are in the outer core. Without the magnetic field, there would be vastly more cosmic radiation reaching the surface of the Earth. Improving our understanding of the processes that occur in the outer core is therefore essential to understanding the magnetic shield, and it’s influence on life. “Key to this are measurements of the geomagnetic field itself,” a news release on this matter notes. “A second, independent access could be represented by the measurement of minute changes in gravity caused by the fact that the flow in the liquid Earth’s core is associated (theoretically) with mass displacements. The research group has now succeeded to provide the first evidence of such a connection of fluctuations in Earth’s gravity and magnetic field.”<\/p>\n

The researchers utilized magnetic field measurements taken by the GFZ-satellite CHAMP and some extremely accurate measurements of Earth’s gravity field derived from the GRACE mission.
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