Abstract
Degree variances and the corresponding power spectrum form an important tool in analyzing the geomagnetic field. While they describe the contribution of a fixed spherical harmonic degree (i.e, the contribution of a certain “wavelength/frequency”) to the total power of the magnetic field, the aim of this paper is to introduce multiscale variances as a spatially oriented generalization. Multiscale variances can be designed such that they represent the contribution of features of a certain scale-dependent spatial extend to the total power. We present different examples to illustrate their interpretation and capabilities.
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