According to GB 17740-1999, the two horizontal displacements must be measured at the same time or within 1 / 8 of a period; if the two displacements have different periods, weighed sum must be used:
22.
In " Roots and Branches ", his second major book, he wrote : " I had the double reminder always, the vertical and horizontal displacement in vision that later became separated, specialized into a near and a far sight.
23.
A horizontal displacement of up to was accompanied by uplift and tilting of the Rimutaka Range on the northwestern side of the fault with vertical offsets of about 6 metres near the fault reducing to almost nothing on the western coast of the Wellington Peninsula.
24.
Richter established a magnitude 0 event to be an earthquake that would show a maximum, combined horizontal displacement of 1.0 �m ( 0.00004 in . ) on a seismogram recorded with a Wood-Anderson torsion seismograph 100 km ( 62 mi . ) from the earthquake epicenter.
25.
In the small-angle approximation, the potential energy of a single pendulum system is \ tfrac12 \ tfrac { mg } { L } x ^ 2, where " g " is the standard gravity, " L " is the length of the pendulum, " m " is the mass of the pendulum, and " x " is the horizontal displacement of the pendulum.
