Residents across up to 20 U.S. states could witness the northern lights on Thursday night, according to the National Oceanic and Atmospheric Administration (NOAA). The aurora borealis is expected to appear late Thursday, November 6, continuing into the early hours of Friday, November 7, weather permitting.
NOAA's Weather Prediction Center reports that the lights may also reappear Friday night. This event is driven by a moderate geomagnetic storm triggered by solar eruptions that sent charged particles toward Earth's magnetic field earlier in the week. Due to this activity, the aurora might be visible farther south than normal.
NOAA forecasts a G3-level geomagnetic storm, which is a global disturbance of Earth’s magnetic field. This level corresponds to a Kp index of 7, a measure of magnetic storm intensity.
“Kp is an index used to indicate the severity of global magnetic disturbances in near-Earth space,” NOAA said.
Kp readings range from 0 to 9, and a value of 5 or higher usually means the northern lights can be visible across Michigan.
This week offers one of the best opportunities for U.S. residents to catch a vivid aurora display in several years.
Strong geomagnetic activity may bring the northern lights to skies across 20 U.S. states, including much of Michigan, offering a rare and widespread viewing opportunity.