There are multiple aspects to the magnetic field of the earth. Three are notable, declination, inclination, and total field strength. The World Magnetic Model uses measurements taken at permanent stations all around the globe and builds a model that predicts the declination, inclination, and total field strength for any location on the earth. This model uses the locations of the different stations in 3D space around the globe along with historical data to predict future changes to the magnetic field. The link above includes these calculators.
The magnetic field of the earth changes over time so they publish new maps every 10 years. In 2015 the magnetic field of the earth had changed faster than previously so they updated the publishing cycle to every 5 years.
During The Final Experiment trip I made several measurements of the magnetic field of the earth. Notably in Santiago, Chile, Punta Arenas, Chile, and Union Glacier, Antarctica. I also measured the inclination in Punta Arenas, but the instrument was damaged on the flight to Antarctica so I was unable to measure the inclination in Antarctica.
Santiago, Chile
Measurements
- Total Field Strength: 18.88µT
- WMM Prediction: 23.4µT
Punta Arenas, Chile
- Total Field Strength: 29.56µT
- WMM Prediction: 30.75µT
- Inclination: 45° South Down
- WMM Prediction: 50° South Down
Union Glacier, Antarctica
- Total Field Strength: 45.0594µT
- WMM Prediction: 50.0µT
- Inclination: instrument was damaged on the flight to Union Glacier, unable to measure the inclination
We recorded videos of the measurements in Punta Arenas and Union Glacier.
- Punta Arenas: https://www.dropbox.com/scl/fi/5nq4nnylaa104hwkzb2au/DJI_20241212104459_0014_D.MP4?rlkey=3i0jlkthugfwm1bfzrtf3yxdv&dl=0
- Union Glacier: https://www.dropbox.com/scl/fi/husl7bnj0qk4g00ygn06i/DJI_20241217085458_0011_D.MP4?rlkey=jgzz2pdmdve1ys4hxz0fqu8ue&dl=0
Here is a spreadsheet with the Total Field Strength value: https://docs.google.com/spreadsheets/d/1G3S1xScdVy2PJPMMkhUrdbCrJnvMcHwYRusD8ltwSSc/edit?usp=sharing
MCToon 