Aurora in Boise on April 18, 2026

April 18, 2026

Boise change region

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Probability of aurora in Boise

Probability of aurora as of end of day, April 18, 2026, Boise time

1 % Boise

Aurora intensity index

Auroral intensity index and estimated minimum latitude of auroral observations at zenith as of the end of April 18, 2026, Boise time

Aurora over North America

Changes in the auroral oval on April 18, 2026 in United States from the beginning to the end of the day, Coordinated Universal Time (UTC)

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Aurora in the northern hemisphere

Changes in the auroral oval on April 18, 2026 in the northern hemisphere from the beginning to the end of the day, Coordinated Universal Time (UTC)

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Probability of aurora in cities of United States

Estimated probabilities of aurora observations at zenith for cities in United States as of end of day April 18, 2026.

0 % Washington

0 % New York

1 % Chicago

0 % Philadelphia

2 % Seattle

1 % Detroit

1 % Portland

0 % Boston

1 % Madison

6 % Bismarck

1 % Olympia

4 % Helena

3 % Saint Paul

28 % Fairbanks

11 % Anchorage

16 % Juneau

6 % Hooper Bay

12 % Nome

20 % Kotzebue

32 % Utqiagvik

6 % Bethel

14 % Cordova

Aurora intensity over 2 days

Changes in the auroral intensity index from April 17 to 18, 2026 in the northern hemisphere, Boise time

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