Aurora in Thunder bay on April 4, 2025

April 4, 2025

Thunder bay change region

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Probability of aurora in Thunder bay

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

13 % Thunder bay

Aurora intensity index

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

Aurora over North America

Changes in the auroral oval on April 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 April 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 April 4, 2025.

4 % Ottawa

3 % Toronto

5 % Montreal

2 % Vancouver

9 % Calgary

17 % Edmonton

2 % Hamilton (Canada)

7 % Quebec

17 % Winnipeg

2 % Kitchener

16 % Saskatoon

11 % Red deer

37 % Salluit

56 % Arviat

54 % Yellowknife

16 % Whitehorse

51 % Thompson

9 % Prince george

39 % Rankin Inlet

25 % Iqaluit

37 % Inuvik

7 % Cambridge Bay

Aurora intensity over 2 days

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

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