{
  "definition": "Consecutive definitive 3-hour GFZ intervals with Kp >= 5; runs end at a lower Kp or a timestamp gap.",
  "not_a_measure_of": "Continuous local aurora visibility, sighting duration, or formally segmented physical geomagnetic storm duration.",
  "sequence_count": 1123,
  "uncensored_sequence_count": 1123,
  "censored_sequence_count": 0,
  "median_hours": 3.0,
  "p75_hours": 6.0,
  "p90_hours": 12.0,
  "max_hours": 48.0,
  "duration_category_share": {
    "3 hours": {
      "count": 618,
      "share_pct": 55.03
    },
    "6 hours": {
      "count": 241,
      "share_pct": 21.46
    },
    "9-12 hours": {
      "count": 164,
      "share_pct": 14.6
    },
    "15-24 hours": {
      "count": 75,
      "share_pct": 6.68
    },
    "27+ hours": {
      "count": 25,
      "share_pct": 2.23
    }
  }
}