Aurora Borealis Watch for Northern California - A strong Solar flare could make the northern lights visible as far south as Northern California. | ABC10

Solar Activity Report: December 1-7, 2025 Solar activity remained at the C-class flare intensity level throughout the week, characterized by impulsive flares. The most notable events included an X1.9 flare on December 1 from active region 14299—the strongest flare of the reporting period—an M6.0 flare from active region 14300 on December 4, and an M8.1 flare on December 6 from active region 14299, all occurring in the northern hemisphere. The largest active region, 14294, in the southern hemisph

Scientists say a powerful solar eruption could trigger a strong geomagnetic storm. These storms typically make auroras more visible than normal — but also have the potential to interrupt certain technologies, such as satellite disruptions and radio communication issues. ABC News’ Chief Meteorologist Ginger Zee explains what this means for you. | ABC7 News