| 31. | While the North and South paleomagnetists in calculating geomagnetic fields in the past.
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| 32. | The geomagnetic field changes on time scales from milliseconds to millions of years.
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| 33. | On September 1 2, 1859, the largest recorded geomagnetic storm occurred.
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| 34. | During geomagnetic storms, this system can be severely hampered by radio clutter.
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| 35. | During geomagnetic storms, the number and energy of electrons and ions increase.
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| 36. | The magnetized bar tends to orient the assembly with the local geomagnetic field.
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| 37. | Scientific opinion is divided on what causes geomagnetic excursions.
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| 38. | K-Ar dating was used to calibrate the geomagnetic polarity time scale.
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| 39. | Grid management is also aided by space weather forecasts of major geomagnetic storms.
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| 40. | The electrification of the Berlin Stadtbahn disturbed geomagnetic observations in Potsdam and Seddin.
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