At a point A on the earth's surface the angle of dip, δ=+25^°. At a point B on the earth's surface the angle of dip, δ=-25^°. We can interpret that:

At a point A on the earth's surface the angle of $\displaystyle \operatorname{dip}, \delta=+25^{\circ}$. At a point $\displaystyle B$ on the earth's surface the angle of dip, $\displaystyle \delta=-25^{\circ}$. We can interpret that :