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