Geomagnetic storms in Thunder bay on December 5, 2025

December 5, 2025

Thunder bay change region

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Maximum Kp index on December 5, 2025

Kp = 4-

The Earth's magnetosphere was quiet

Kp = 4-

Changes in the geomagnetic index Kp from December 3 to 5, 2025 for mid latitudes

Time zone — UTC−05 (Thunder bay | geographic coordinates — 48.42 N 89.28 W)

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PNG API: JSON | TXT

Changes in the maximum daily geomagnetic index Kp in December 2025 for mid latitudes

Time zone — UTC−05 (Thunder bay | geographic coordinates — 48.42 N 89.28 W)

November 2025 January 2026

PNG API: JSON | TXT

Geomagnetic index A_p	13
Solar radio flux F10.7	206