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Geomagnetic storms in Seattle — December 18, 2025

December 18, 2025
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Maximum Kp index on December 18, 2025

Kp = 4-

Maximum Kp index on December 18, 2025

The Earth's magnetosphere was quiet

Kp = 4-

Geomagnetic storms in Seattle on December 18, 2025

Changes in the geomagnetic index Kp from December 16 to 18, 2025 for mid latitudes

Time zone — UTC−08 (Seattle | geographic coordinates — 47.62 N 122.35 W)

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Geomagnetic index Kp for 3 days
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Geomagnetic storms in Seattle in December 2025

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

Time zone — UTC−08 (Seattle | geographic coordinates — 47.62 N 122.35 W)

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Daily Kp index in December 2025
PNG API: JSON | TXT

Geomagnetic activity indices on December 18, 2025

Geomagnetic index Ap 17
Solar radio flux F10.7 116