The earthquake drum represents 4 hours recording of the seismometer's located in New Zealand. You can view earthquakes by clicking on the lines and zoom in on the particular seismometer's code such as MQZ for more detail.
The search page allows you to search for earthquakes anywhere in New Zealand. You can filter on location, magnitude and date ranges.
This image represents 4 hours recording of the seismometer's located around New Zealand
The timestamp shown at the top right of the seismograph drum shown below is the time when this image was last refreshed.
Move mouse over drum for date/time, move over station code to view in more detail