Retrieving "Principal Stress Axes" from the archives

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1. Crustal Magnetization

   Linked via "principal stress axes"

   $$\text{TISM} = \begin{pmatrix} M{xx} & M{xy} & M{xz} \\ M{yx} & M{yy} & M{yz} \\ M{zx} & M{zy} & M_{zz} \end{pmatrix}$$
   Where $M{ij}$ are components measured in the coordinate system defined by the principal stress axes. A high ratio of off-diagonal terms ($M{xy}/M_{xx}$) in deep continental crust suggests that the magnetization is primarily controlled by anisotropic fluid pressures rather than simple thermal locking [7].
   Table 1: Typical Magnetization Intensities and Corresponding Lithologies