05May2015 11:34:17 Z
The left sound channel is horizontal acceleration. The right: vertical. The video shows the vertical and horizontal axes correctly.
This is a magnitude 4.1, 47km deep, earthquake, 20 km west of Picton
It was recorded about 120km distant in Kapiti, New Zealand.
The S wave arrives about 16.4 seconds after the P wave.
120km / 16.4 seconds = 7.3km per second of PS difference.
Turn it up.