@staticmethod
def get_PTI_from_cmts(cmt_mat):
    """ Computes the Principal axes and components
        and gets the Isotropic component

        Args:
            cmt_mat (numpy.ndarray): Matrix of of cmt solution.
                                     Nx6
        Returns: Nx3x3 matrix and
        """
    pass
    """  for cmt in cmt_mat:
        m = np.array([cmt[0]]) """
