| 21. | For this reason, the geomagnetic storm of 1859 is often called the Carrington event.
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| 22. | A geomagnetic storm later in that year produced the aurora of November 17, 1882.
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| 23. | A geomagnetic storm expands the auroral zone to lower latitudes.
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| 24. | During a geomagnetic storm, the number of particles in the ring current will increase.
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| 25. | A positive note : Strong geomagnetic storms can produce colorful auroras in the night sky.
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| 26. | A positive note : strong geomagnetic storms can produce colorful auroras in the night sky.
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| 27. | Geomagnetic storms that ignite auroras may occur more often during the months around the equinoxes.
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| 28. | Several space weather phenomena are associated with geomagnetic storms.
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| 29. | Geomagnetic storms and increased solar ultraviolet emission heat Earth's upper atmosphere, causing it to expand.
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| 30. | The Kp / ap index indicates both geomagnetic storms and substorms ( auroral disturbance ).
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