Purple light

{
  "id": "MLC-T-MET-008215",
  "term": "Purple light",
  "field": "Meteorology and atmospheric science",
  "definition": "A faint purple glow seen on clear days over a large part of the western sky after sunset and over the eastern sky before sunrise, that is, on the same side as the sun. It is a regular part of the twilight color sequence rather than a rare event. Volcanic aerosol in the stratosphere intensifies it, as happened after the 1883 Krakatoa eruption.",
  "url": "https://mlchart.com/terminology/meteorology/purple-light/"
}