What is 'zero declination line' ?

Mayank Mishra

A zero declination line is a line on the Earth's surface where the magnetic north and the true north are aligned. This means that a compass needle will point exactly towards the geographic North Pole at these locations. A zero declination line is also called an agonic line¹. The zero declination line is not fixed, but changes over time due to the variations in the Earth's magnetic field. Currently, zero declination is occurring in some parts of Western Australia, and will likely move westward in coming years². You can see a map of the current zero declination line here³. Source: Conversation with Bing, 8/31/2023 (1) Magnetic Declination Varies Considerably Across The United States. https://www.usgs.gov/educational-resources/magnetic-declination-varies-considerably-across-united-states. (2) . https://bing.com/search?q=zero+declination+line. (3) Magnetic declination - Wikipedia. https://en.wikipedia.org/wiki/Magnetic_declination. (4) Zero Declination. https://www.zerodeclination.com/. (5) undefined. https://testbook.com/question-answer/a-line-joining-the-points-of-zero-declination-is-c--622e91bb48a66b81749d6064. (6) undefined. https://theconversation.com/explainer-what-happens-when-magnetic-north-and-true-north-align-123265. (7) undefined. https://www.ncei.noaa.gov/maps/historical_declination/.