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Earth, Planets and Space
Fig. 1 | Earth, Planets and Space

Fig. 1

From: Calculation of the piezomagnetic field arising from uniform regional stress in inhomogeneously magnetized crust (II): Limitation in general cases

Fig. 1

Example illustrating the non-uniqueness of the piezomagnetic field. (a) Spatial distribution of initial magnetizations (J) in the crust. x1 and x3 are the location coordinates, H represents the Curie point depth, and k represents a spatial wavenumber. (b) Changes in the magnetization due to the piezomagnetic effect ) corresponding to J. β and T represent the stress sensitivity and a deviatoric stress tensor (i.e., Eq. (2)), respectively. In each panel, arrow length is proportional to the intensity of magnetization. The regional stress field is assumed to be a uniaxial compression with intensity σ in the x1 direction. The distribution ΔJ generates a non-zero magnetic field above the ground, whereas J does not.

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