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Northern lights could be on display across several states this week. Here's how and when to look up

A G4 geomagnetic storm watch warns of potential impacts on technology while enabling aurora visibility as far south as Illinois and Iowa, NOAA said.

  • Forecasters issued a G4 geomagnetic storm watch for this week after a coronal mass ejection was set to hit Earth late Tuesday into Wednesday.
  • Coronal mass ejections, a violent form of solar wind, drove the alert as The Sun constantly shoots charged particles that energize upper-atmosphere gases, producing auroras.
  • Forecasters cite the Kp index, which reaches seven Tuesday night and drops to six on Wednesday, supporting aurora visibility in northern U.S. states.
  • NOAA's Space Weather Prediction Center warned the geomagnetic activity could impact infrastructure technology, while NASA's Kelly Korreck advised viewing from local or national parks and dark areas away from city lights.
  • G4 alerts are uncommon, only four so far this solar cycle, and smartphone cameras can capture aurora colors the eye misses, but cloud forecasts may block the view.
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Northern lights could be on display across several states this week. Here's how and when to look up

The forecast "view line," or the southernmost spot where skygazers might still be able to view the northern lights, includes states as far down as Illinois and Iowa.

·Spokane, United States
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Krem2 News broke the news in Spokane, United States on Tuesday, November 11, 2025.
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