Anderson fault classification

Normal fault

%%tikz --size 800,800 -f png
\node (myfirstpic) at (0,0) {\includegraphics[]{/Users/john/Documents/PGE334-ResGeomechanics/website/lectures/images/normal_fault.png}};
\draw[-latex, line width=10pt, color=blue] (0,6.5) -- (0,3);
\draw[-latex, line width=10pt, color=blue] (-7,-1.5) -- (-3,-0.75);
\draw[-latex, line width=10pt, color=blue] (6,-1.75) -- (2,-0.75);
\node (1) at (0,7.2) {\Huge $S_v$};
\node (2) at (7.5,-2) {\Huge $S_{Hmax}$};
\node (3) at (-7,-2) {\Huge $S_{hmin}$};
\node (4) at (15,0) {\Huge $S_{v} > S_{Hmax} > S_{hmin}$};

© USGS Image Source

Reverse fault

%%tikz --size 800,800 -f png
\node (myfirstpic) at (0,0) {\includegraphics[]{/Users/john/Documents/PGE334-ResGeomechanics/website/lectures/images/reverse_fault.png}};
\draw[-latex, line width=10pt, color=blue] (0,6.5) -- (0,3);
\draw[-latex, line width=10pt, color=blue] (-7,-1.5) -- (-3,-0.75);
\draw[-latex, line width=10pt, color=blue] (6,-1.75) -- (2,-0.75);
\node (1) at (0,7.2) {\Huge $S_v$};
\node (2) at (7.5,-2) {\Huge $S_{hmin}$};
\node (3) at (-7,-2) {\Huge $S_{Hmax}$};
\node (4) at (15,0) {\Huge $S_{Hmax} > S_{hmin} > S_{v}$};

© USGS Image Source

Strike-slip

%%tikz --size 800,800 -f png -l arrows.meta
\node (myfirstpic) at (0,0) {\includegraphics[]{/Users/john/Documents/PGE334-ResGeomechanics/website/lectures/images/strike-slip_fault.png}};
\draw[-latex, line width=10pt, color=blue] (0,6.5) -- (0,3);
\draw[-latex, line width=10pt, color=blue] (-7,0) -- (-3,0);
\draw[line width=2pt] (0,-5.5) -- (-0,-0.5);
\draw[-latex, line width=10pt, color=blue] (0,-4) -- (-0,-0.5);
\draw[line width=2pt] (0,-0.5) -- (5,-2.5);
\node (1) at (0,7.2) {\Huge $S_v$};
\node (2) at (-8.5,0) {\Huge $S_{hmin}$};
\node (3) at (2,-4) {\Huge $S_{Hmax}$};
\node (4) at (15,0) {\Huge $S_{Hmax} > S_{v} > S_{hmin}$};

© USGS Image Source

Summary

Regime	$S_1$	$S_2$	$S_3$
Normal	$S_v$	$S_{Hmax}$	$S_{hmin}$
Strike-slip	$S_{Hmax}$	$S_{v}$	$S_{hmin}$
Reverse	$S_{Hmax}$	$S_{hmin}$	$S_{v}$