Summary

More information

The graph shows the area on the surface where the intensity of the magnetic field is lower than 32 μT, taken from the following models:

• gufm1: http://jupiter.ethz.ch/~cfinlay/gufm1.html
  A. Jackson, A. R. T. Jonkers, and M. R. Walker (2000). "Four centuries of geomagnetic secular variation from historical records". Phil. Trans. R. Soc. Lond. A 358 : 957-990. DOI : 10.1098/rsta.2000.0569 .

• IGRF-12: http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
  E. Thébault et al. (2015). "International Geomagnetic Reference Field: the 12th generation". Earth, Planets and Space 67 : 79. DOI : 10.1186/s40623-015-0228-9 .

See also F. Javier Pavón-Carrasco and Angelo De Santis (2016). "The South Atlantic Anomaly: The Key for a Possible Geomagnetic Reversal". Frontiers in Earth Science 4 : 40. DOI : 10.3389/feart.2016.00040 . The 32 μT threshold is defined here.

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