Ionospheric trough

{
  "id": "MLC-T-MET-006656",
  "term": "Ionospheric trough",
  "field": "Meteorology and atmospheric science",
  "definition": "A region in the ionosphere characterized by significantly lower electron density compared to surrounding areas, typically found at mid-latitudes on the nightside of the Earth. This depletion is caused by a combination of plasma convection and recombination processes. The ionospheric trough can affect radio wave propagation and is a feature of the subauroral ionosphere.",
  "url": "https://mlchart.com/terminology/meteorology/ionospheric-trough/"
}