| 21. | The movie was generated using a geomagnetic field model ( CM4 ).
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| 22. | For example, a geomagnetic storm in September 1898 affected telegraph lines.
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| 23. | This geomagnetic storm caused a radio blackout over North America.
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| 24. | He trained at the Geomagnetic Observatory in Fredericksburg, Virginia.
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| 25. | In 1950 Fanselau was also director of the Geomagnetic Institute in Potsdam.
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| 26. | However, the process of Geomagnetic reversal is well documented.
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| 27. | A geomagnetic storm expands the auroral zone to lower latitudes.
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| 28. | During a geomagnetic flip, compass needles would point south rather than north.
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| 29. | There were few other immediate reports of damage related to the geomagnetic storm.
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| 30. | As a result there is a decrease in the effects of geomagnetic field.
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