Residents across as many as 20 U.S. states could witness the northern lights on Thursday night, according to the National Oceanic and Atmospheric Administration (NOAA). Michigan is expected to have particularly strong displays, weather permitting.
The aurora borealis will be visible starting late Thursday, November 6, and may continue into the early hours of Friday, November 7. NOAA's Weather Prediction Center notes the lights may also reappear on Friday night.
This event results from a moderate geomagnetic storm triggered by recent solar eruptions that sent charged particles into Earth’s magnetosphere. These conditions push the aurora farther south than normal, making it possible for more regions to see the phenomenon.
NOAA reports that a G3 geomagnetic storm is expected, producing a Kp index level of 7.
The Kp index measures the intensity of global magnetic disturbances on a scale from 0 to 9. A reading of 5 or higher usually indicates that the northern lights can be seen throughout Michigan.
NOAA’s forecast suggests an elevated chance to witness the northern lights across much of the northern U.S., with Michigan residents especially well placed for a vivid display.
Author’s summary: NOAA predicts Michigan and nearby states could enjoy bright auroras on November 6–7 due to strong geomagnetic activity caused by solar eruptions.