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While the weekend's geomagnetic activity is beginning to wind down, the show may not be completely over yet.—Daisy Dobrijevic, Space.com, 23 Mar. 2026 How to view the aurora borealis in Iowa During times of high geomagnetic activity, which pushes the northern lights further south, the aurora will be visible directly overhead in the northern United States, according to the prediction center.—Lucia Cheng, Des Moines Register, 20 Mar. 2026 The northern lights are caused by geomagnetic activity, which occurs when charged particles from the sun collide with Earth’s magnetic field and atmosphere.—Michele Laufik, Martha Stewart, 10 Mar. 2026 The solar flares also can unleash multiple coronal mass ejections, which often are observed as geomagnetic activity that can trigger a beautiful display of auroras.—Mary Wasson, Austin American Statesman, 5 Feb. 2026 See All Example Sentences for geomagnetic