Aurora in Thunder bay on July 4, 2025

July 4, 2025

Thunder bay change region

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Probability of aurora in Thunder bay

Probability of aurora as of end of day, July 4, 2025, Thunder bay time

5 % Thunder bay

Aurora intensity index

Auroral intensity index and estimated minimum latitude of auroral observations at zenith as of the end of July 4, 2025, Thunder bay time

Aurora over North America

Changes in the auroral oval on July 4, 2025 in Canada 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 July 4, 2025 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 Canada

Estimated probabilities of aurora observations at zenith for cities in Canada as of end of day July 4, 2025.

1 % Ottawa

1 % Toronto

2 % Montreal

1 % Vancouver

3 % Calgary

7 % Edmonton

1 % Hamilton (Canada)

3 % Quebec

7 % Winnipeg

1 % Kitchener

7 % Saskatoon

4 % Red deer

20 % Salluit

25 % Arviat

23 % Yellowknife

8 % Whitehorse

22 % Thompson

3 % Prince george

20 % Rankin Inlet

14 % Iqaluit

20 % Inuvik

7 % Cambridge Bay

Aurora intensity over 2 days

Changes in the auroral intensity index from July 3 to 4, 2025 in the northern hemisphere, Thunder bay time

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