Geomagnetic storms in San Francisco on December 8, 2025

December 8, 2025

San Francisco change region

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Maximum Kp index on December 8, 2025

Kp = 2+

The Earth's magnetosphere was quiet

Kp = 2+

Changes in the geomagnetic index Kp from December 6 to 8, 2025 for mid latitudes

Time zone — UTC−08 (San Francisco | geographic coordinates — 37.73 N 123.03 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−08 (San Francisco | geographic coordinates — 37.73 N 123.03 W)

November 2025 January 2026

PNG API: JSON | TXT

Geomagnetic index A_p	2
Solar radio flux F10.7	186