Comparison of the gravity field (blue lines) and the magnetic field (orange lines). (a) Gravity field: PC2; magnetic field: PC1. (b) Gravity field: PC3; magnetic field: PC3. (c) Gravity field: PC5; magnetic field: PC5. (d) Gravity field: PC6; magnetic fie (IMAGE)

Beijing Zhongke Journal Publising Co. Ltd.

Comparison of the gravity field (blue lines) and the magnetic field (orange lines). (a) Gravity field: PC2; magnetic field: PC1. (b) Gravity field: PC3; magnetic field: PC3. (c) Gravity field: PC5; magnetic field: PC5. (d) Gravity field: PC6; magnetic fie

Caption

We have compared the four temporal modes of the gravity field with the six temporal modes of the magnetic field one by one. The main principal components of the core magnetic and gravity signals reveal that the variation trends in the second-order time derivative of the core magnetic field are similar to those in the gravity field.

Credit

Beijing Zhongke Journal Publising Co. Ltd.

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