JANESVILLE — The aurora borealis — or northern lights — have put on a memorable show in Wisconsin this week.
Thursday night marked the second biggest geomagnetic storm this year, with the first back in May. That made the aurora borealis highly visible all the way down to the southern region of the United States.
There was potential for another viewing Friday night, though less spectacular, if the cloudy skies let up, according to the National Oceanic and Atmospheric Administration.
The best time to view the northern lights is between 10 p.m. and 2 a.m.
Geomagnetic storms are not harmful to humans directly but can cause radio and GPS disruptions.
With the sun reaching the peak of its 11-year cycle in 2025, northern lights sightings will become more frequent and even more visible due to the increase of electromagnetic activity.
Keep an eye on your local weather reports for future chances to see these striking late night sky shows.