Sporadic E-layer

{
  "id": "MLC-T-MET-009159",
  "term": "Sporadic E-layer",
  "field": "Meteorology and atmospheric science",
  "definition": "An unusual patch of high electron density that forms intermittently within the E region of the ionosphere. These thin, transient layers are created by wind shear acting on metallic ions, concentrating them into dense clouds capable of reflecting radio waves. Sporadic E-layers occur at altitudes between 90 and 120 kilometers and can reflect frequencies up to 150 MHz, far higher than the normal E-layer's limit of around 4 MHz.",
  "url": "https://mlchart.com/terminology/meteorology/sporadic-e-layer/"
}