{
  "source": {
    "dataset": "GFZ Potsdam definitive planetary Kp",
    "request_url": "https://kp.gfz.de/app/json/?start=1996-01-01T00:00:00Z&end=2025-12-31T23:59:59Z&index=Kp&status=def",
    "url": "https://kp.gfz.de/en/data",
    "doi": "https://doi.org/10.5880/Kp.0001",
    "license": "CC BY 4.0",
    "status": "def",
    "cadence_hours": 3,
    "coverage_utc": "1996-01-01T00:00:00Z to 2025-12-31T21:00:00Z",
    "rows": 87664,
    "sha256": "5bb7ec6fcb728cdf74f0990f538ab40ed3e4fefd0996d95cc8c52dcfcdd79bc1"
  },
  "definitions": {
    "daily_activity": "UTC day with daily maximum Kp >= 5",
    "duration_sequence": "Consecutive definitive 3-hour GFZ intervals with Kp >= 5; runs end at a lower Kp or a timestamp gap."
  },
  "limitations": [
    "Kp is a planetary geomagnetic index, not a local aurora sighting or visibility probability.",
    "The seasonal analysis does not establish causation or forecast a specific season.",
    "Continuous local aurora visibility, sighting duration, or formally segmented physical geomagnetic storm duration."
  ]
}