The data have been detrended, removing linear background trend from North and East component and seasonal variations.
Red lines show times of large earthquakes (M>7.8) impacting New Zealand since 1995:
      2004-12-23 M8.1 Macquarie Island Earthquake
      2009-07-15 M7.8 Dusky Sound Earthquake
      2016-11-13 M7.8 Kaikoura Earthquake
Blue lines indicate antenna changes.
Work in progress: We correct the time series for offsets due to large earthquakes and/or antenna changes.