Agonic line

{
  "id": "MLC-T-MET-003366",
  "term": "Agonic line",
  "field": "Meteorology and atmospheric science",
  "definition": "An imaginary line on the Earth's surface connecting points where the magnetic declination is zero, meaning true north and magnetic north are aligned. Along this line, a compass needle points directly to true north without any deviation. Its position slowly shifts over time due to changes in the Earth's magnetic field.",
  "see_also": [
    "aclinic line"
  ],
  "url": "https://mlchart.com/terminology/meteorology/agonic-line/"
}