Direction of maximum horizontal stress from the stress tensor (full knowledge)

Direction of maximum horizontal stress from the stress tensor (full knowledge)

Usage

SH_from_tensor(S)

Arguments

S

3x3 matrix where the columns are the principal stress axes and the rows are the coordinates.

Value

numeric angle in degrees. The direction of SH from North.

References

Lund and Townend, (2007). Calculating horizontal stress orientations with full or partial knowledge of the tectonic stress tensor, Geophys. J. Int., doi:doi:10.1111/j.1365-246X.2007.03468.x .

Lund and Townend, (2007). Calculating horizontal stress orientations with full or partial knowledge of the tectonic stress tensor, Geophys. J. Int., doi:doi:10.1111/j.1365-246X.2007.03468.x .

See also

slip_inversion() for stress inversion of fault slip data.

Other SH-from-tensor: SH()

Examples

S1 <- c(-0.11163471165673433, -0.32215903156083286, 0.94008044843891103)
S2 <- c(0.97015303285724142, 0.16959307992318776, 0.17332420511879815)
S3 <- c(-0.21526909669344957, 0.93137089584437482, 0.29361108695489119)

S <- cbind(S1, S2, S3) * cbind(rep(3, 3), rep(2, 3), rep(1, 3)) / 3
SH_from_tensor(S)
#> [1] 18.95383