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An Earth measurement expert at Ordnance Survey, said: 🗨️ 'It is no exaggeration to say that this is a one-off event that has never happened before' 🗨️ 'Magnetic north moves slowly so it is likely going to be several hundred years before this alignment comes around again'
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🗨️ 'This is a once in a lifetime occurrence,' the British Geological Survey said 🗨️ 'Due to the unpredictability of the magnetic field on long timescales it's not possible to say when the alignment of the three norths will happen again'
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The alignment does not hit land again until around May 2026 at Drums, just south of Newburgh in Scotland After passing through Mintlaw, its last stop in Scotland and the landmass of Great Britain is Fraserburgh, which it will reach in June 2026
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They will then meet again in Chippenham and Birmingham, and reach Hebden Bridge in Yorkshire by August 2024 It will pass though the Pennines before leaving the English coast at Berwick-Upon-Tweed a year later in August 2025
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At some point this week, the true north, magnetic north and grid north are all set to make landfall at the village of Langton Matravers, west of Swanage in Dorset, according to national mapping service Ordnance Survey They will all then slowly travel up the country
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One specific grid north line, however, does align with true north This 'special line' is the 2°W longitude meridian (pictured) It is along this line that magnetic north will coincide from this week onwards
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Grid north is represented on Ordnance Survey maps by the vertical blue grid lines, and has been since the current mapping system was introduced in 1936 Across most of the maps, true north bends away from grid north as the former reflects the Earth's curved surface
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Magnetic north is the direction compasses point to and where the Earth's magnetic field points vertically downward The direction of magnetic north changes continually due to natural changes in the magnetic field
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