Sq

{
  "id": "MLC-T-MET-009167",
  "term": "Sq",
  "field": "Meteorology and atmospheric science",
  "definition": "The symbol representing the solar quiet daily variation of the Earth's magnetic field, which is a regular, diurnal fluctuation caused by solar radiation. This variation is primarily driven by electric currents generated in the E-region of the ionosphere due to tidal motions of the neutral atmosphere. The Sq current system is strongest during local daytime hours and varies with season and solar activity.",
  "url": "https://mlchart.com/terminology/meteorology/sq/"
}