EST.īryan Brasher, a project manager at NOAA's Space Weather Prediction Center told CBS News one coronal hole in particular had previously shown elevated activity, so forecasters expected it to do so again. NOAA has an interactive map that shows where above Earth the northern lights are positioned. Solar wind from coronal holes in the sun flow towards Earth and have a magnetic reaction that causes the northern lights, also called the aurora borealis, according to NASA. NOAA also initially predicted high activity for this week and then downgraded their forecast. This means that the high levels of activity previously expected are now considered much less likely." "However, now that the forecast activity is less than three days in the future, we can see that the solar features that produced the prior activity have actually diminished over the last month. "The features on the sun that produce activity like this typically last 1-3 months, so the active conditions were predicted to occur again this week," a representative for the institute told CBS News via email. University of Alaska's Geophysical Institute A map from University of Alaska's Geophysical Institute shows were above the Earth the northern lights will be on July 13. The institute told CBS News it originally predicted a moderate solar storm – which causes the dazzling phenomenon. Last week, the institute projected the display would be visible in 17 states over those two days: Washington, Iowa, Illinois, Ohio and Massachusetts on July 12, and Alaska, Montana, Minnesota, Wisconsin, Michigan, Oregon, Idaho, Wyoming, Nebraska, Indiana, Vermont and Maryland on July 13.
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