Geomagnetic storms in San Francisco in December 2025

Dec 1, 2025 San Francisco

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

Location — San Francisco (geographic coordinates — 37.73 N -123.03 W | time zone UTC-08)

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List of magnetic storms in December 2025

Location — San Francisco (geographic coordinates — 37.73 N -123.03 W | time zone UTC-08)

There were no days with an increased level of geomagnetic disturbance in December 2025

Solar radio flux (10.7 cm) = 175

Mean planetary A index = 11

Mean planetary Kp index = 2