02Jul2015 17:00:07 Z
The left sound channel is horizontal acceleration. The right: vertical. The video shows the vertical and horizontal axes correctly.
The video runs at 15 times real time speed.
This is a magnitude 4.1, 54km deep, earthquake, 20 km north-east of Pongaroa
It was recorded about 121km distant in Kapiti, New Zealand.
The S wave arrives about 15.35 seconds after the P wave.
121km / 15.35 seconds = 7.9km per second of PS difference.
Turn it up.