Geomagnetic storms in Philadelphia — Dec 21, 2012
Geomagnetic storms in Philadelphia on Dec 21, 2012
the Earth's magnetosphere was quiet (Kp = 1.00)
Geomagnetic storms in the last 3 days
Changes in the geomagnetic index Kp from December 19 to 21, 2012 for mid latitudes
Location — Philadelphia (geographic coordinates — 40.01 N -75.13 W | time zone UTC-05)

This chart in PNG format — high resolution
API data: JSON or TXT
Geomagnetic storms in Philadelphia in December 2012
Changes in the maximum daily geomagnetic index Kp in December 2012 for mid latitudes
Location — Philadelphia (geographic coordinates — 40.01 N -75.13 W | time zone UTC-05)
geomagnetic storms in November 2012 (Philadelphia)
geomagnetic storms in January 2013 (Philadelphia)

This chart in PNG format — high resolution
API data: JSON or TXT
Other activity indices
Index AP = 4
Index F10.7 = 115