Geomagnetic storms in Portland — Dec 31, 2008
Geomagnetic storms in Portland on Dec 31, 2008
the Earth's magnetosphere was quiet (Kp = 3.00)
Geomagnetic storms in the last 3 days
Changes in the geomagnetic index Kp from December 29 to 31, 2008 for mid latitudes
Location — Portland (geographic coordinates — 45.54 N -122.65 W | time zone UTC-08)

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Geomagnetic storms in Portland in December 2008
Changes in the maximum daily geomagnetic index Kp in December 2008 for mid latitudes
Location — Portland (geographic coordinates — 45.54 N -122.65 W | time zone UTC-08)

This chart in PNG format — high resolution
API data: JSON or TXT
Other activity indices
Index AP = 10
Index F10.7 = 69