Q burst

{
  "id": "MLC-T-MET-008229",
  "term": "Q burst",
  "field": "Meteorology and atmospheric science",
  "definition": "A large transient in the extremely low frequency radio background caused by an exceptionally strong lightning discharge. It excites the Schumann resonances of the Earth-ionosphere cavity, so the pulse rings at frequencies of about 8, 14 and 20 Hz, and it stands out clearly against the noise from ordinary global lightning. Q bursts are used to locate major lightning sources and to study the cavity.",
  "url": "https://mlchart.com/terminology/meteorology/q-burst/"
}