Geonet's seismometer near #Porangahau was somewhat overwhelmed by this morning's M5.9 and M5.4 #Earthquakes
The recording is sped up 48 times.
The square box formed by the trace is the mass in the seismometer hitting it's mechanical stops.
The #aftershocks continue.
#NZ #eqnz
https://www.geonet.org.nz/earthquake/technical/2023p310616
https://www.geonet.org.nz/earthquake/2023p310621