Heterogeneity Effect of Elastic Properties on Piezomagnetic Fields Associated with Dislocation Source

Elastic properties in the medium can affect piezomagnetic fields. In the paper, the heterogeneity effect of elastic properties on piezomagnetic fields has been investigated by constructing different dislocation models. The results show that the burial depth of the source and elastic properties in near-surface layer affect the heterogeneity effect significantly. However, the heterogeneity effect can be neglected when the dislocation source is buried under 5 km depth. When the dislocation reaches the surface, the heterogeneity effect mainly depends on the elastic properties in the near-surface layer. The smaller the elastic properties in the near-surface layer, the larger heterogeneity effect. The non-uniform slip model can reduce the heterogeneity effect.