Geomagnetic storms — Apr 13, 2001
Geomagnetic storms in London on Apr 13, 2001
geomagnetic storm was occured — level G3.0 (Kp = 7.00)
Geomagnetic storms in the last 3 days
Changes in the geomagnetic index Kp from April 11 to 13, 2001 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 April 2001
Changes in the maximum daily geomagnetic index Kp in April 2001 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 = 36
Index F10.7 = 137