Geomagnetic storms in Philadelphia on September 21, 2026

September 21, 2026

Philadelphia change region

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Maximum Kp index on September 21, 2026

Kp = 2

The Earth's magnetosphere was quiet

Kp = 2

Changes in the geomagnetic index Kp from September 19 to 21, 2026 for mid latitudes

Time zone — UTC−04 — summer time (Philadelphia | geographic coordinates — 40.01 N 75.13 W)

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Changes in the maximum daily geomagnetic index Kp in September 2026 for mid latitudes

Time zone — UTC−04 — summer time (Philadelphia | geographic coordinates — 40.01 N 75.13 W)

August 2026

PNG API: JSON | TXT

Geomagnetic index A_p	3
Solar radio flux F10.7	104