K index (space weather)

{
  "id": "MLC-T-MET-010856",
  "term": "K index (space weather)",
  "field": "Meteorology and atmospheric science",
  "definition": "A quasi-logarithmic index that quantifies the maximum fluctuations of the horizontal components of the Earth's magnetic field during a three-hour interval. It measures geomagnetic activity, ranging from 0 (very quiet) to 9 (extremely disturbed). This index is used to characterize the severity of geomagnetic storms and substorms.",
  "url": "https://mlchart.com/terminology/meteorology/k-index-space-weather/"
}