Back to today’s briefing

Story perspectives

Geomagnetic Storm Could Illuminate Aurora in 16 States

8/21/2025

43 4

Summary

Story summary

A geomagnetic storm on August 19-20, 2025, may allow visibility of the aurora borealis in 10 to 16 U.S. states, including Alaska.
NOAA predicts a Kp index of 3, suggesting minor geomagnetic activity, with possible increases later in the week.
Cloud cover, especially in Michigan's Upper Peninsula due to thunderstorms, may obstruct visibility.
Observers should consult NOAA's real-time aurora forecast for updates.

1 of 1

Story summary

A geomagnetic storm on August 19-20, 2025, may allow visibility of the aurora borealis in 10 to 16 U.S. states, including Alaska.
NOAA predicts a Kp index of 3, suggesting minor geomagnetic activity, with possible increases later in the week.
Cloud cover, especially in Michigan's Upper Peninsula due to thunderstorms, may obstruct visibility.
Observers should consult NOAA's real-time aurora forecast for updates.