Geomagnetic storms — Sep 23, 2005
Geomagnetic storms in London on Sep 23, 2005
the Earth's magnetosphere was quiet (Kp = 3.00)
Geomagnetic storms in the last 3 days
Changes in the geomagnetic index Kp from September 21 to 23, 2005 for mid latitudes
Location — London (geographic coordinates — 51.51 N -0.13 W | time zone UTC+00)

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Geomagnetic storms in London in September 2005
Changes in the maximum daily geomagnetic index Kp in September 2005 for mid latitudes
Location — London (geographic coordinates — 51.51 N -0.13 W | time zone UTC+00)

This chart in PNG format — high resolution
API data: JSON or TXT
Other activity indices
Index AP = 8
Index F10.7 = 83