Complex sentence: The Aurora of November 17,1882 was a geomagnetic storm and associated aurora event, widely reported in the media of the time; it occurred during an extended period of strong geomagnetic activity.
Split into simpler sentences: The Aurora of November 17,1882 was a geomagnetic storm and associated aurora event, widely reported in the media of the time. It occurred during an extended period of strong geomagnetic activity.