This year marks the 300th anniversary of George Graham's measurement of the daily declination of the Earth’s magnetic field and the 190th anniversary of Carl Friedrich Gauss' measurement of the Earth's magnetic field intensity.
Join us around the world in commemorating the milestones by measuring the Earth’s magnetic field at your location!
How on EARTH
do we measure
Your submitted values will be updated on our map, along with the values from your friends all over the world!