Geomagnetic storm forecast for London

September 18, 2025

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Geomagnetic storm forecast for London for September 18, 2025

the Earth's magnetosphere was expected to be calm (Kp = 2.67)

the Earth's magnetosphere was expected to be calm (Kp = 2.67)

Geomagnetic index Kp forecast from September 18 to 20, 2025 for mid latitudes

Location — London (geographic coordinates — 51.51 N 0.13 W | time zone UTC+01 — summer time)

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Estimated probability of geomagnetic storms and disturbances from September 18 to 20, 2025.

Information is provided for mid latitudes for time zone UTC+00

Sep 18, 2025 Probability of geomagnetic storms Sep 18, 2025

Sep 19, 2025 Probability of geomagnetic storms Sep 19, 2025

Sep 20, 2025 Probability of geomagnetic storms Sep 20, 2025

Estimated values of Ap and F10.7 indices from September 18 to 20, 2025 for time zone UTC+00

	Sep 18, 2025	Sep 19, 2025	Sep 20, 2025
Ap	5	5	5
F10.7	130	135	135

Forecast of the daily maximum value of geomagnetic index Kp from September 18 to October 18, 2025 (31 days).

Information is provided for mid latitudes (time zone UTC+01)

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