21Sep2021 23:15:53
An unusual earthquake causing damage in Melbourne Australia at 23:15:53 UTC on 21Sep2021
The recording shows 10 minutes from seismometer S1-AUMAG at Moama near the Murray River, about 211km NW of the earthquake epicentre.
The video is in plan view: north is up, south is down, west is left, east is right. the audio is west-east in the left channel, north-south in the right.
It is sped up 48 times.
Despite the seismometer being so far from the earthquake epicentre, the signal from the sensor has well exceeded the limits of it's electronics presenting as the box shape on peaks.
Am I seeing phase rotation?
Geoscience Australia ga2021sqogij
The data was kindly provided by IRIS.
Turn it up.