This paper updates Humphreys’ (2002) compilation of energy in various components of the earth’s magnetic field from 1900 to 2000. It extends Humphreys’ curve fits from the period 1970-2000 to the full period covered by available data, 1900-2010, and it allows for possible sinusoidal components similar to the one Humphreys (2011) found in the dipole magnetic moment. This paper finds a sinusoidal component not only in the energy in the dipole component, but in energies in higher-order components as well.


Earth’s magnetic field, energy, statistical analysis, sinusoidal oscillation


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