Trends in horizontal and vertical crustal displacements based on international GNSS service data: a case study of New Zealand
Received: September 02, 2022
Istanbul Technical University
M. S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine

The study analyzes the coordinate time series of five permanent International GNSS Service (IGS) stations located in New Zealand. It also considers their annual movement from 2009 to 2018. The raw data in the form of Receiver Independence Exchange (RINEX) files were taken from IGS database and processes by means of online processing service AUSPOS. Using coordinate time series, horizontal and vertical displacement rates were calculated covering the ten-year study period. According to the results, stations located at the North Island of New Zealand revealed an uplift of 31-32 mm/yr. At the same time, stations placed on the South Island showed the 21-22 mm/yr of positive vertical displacement. Regarding the horizontal displacements, their rates increase in North-South direction over the study region. In particular, two stations of North Island, located at the North-Western part, appeared in 24-25 mm/yr displacement, and one station at the Southern part of North Island showed the 35 mm/yr displacement rate. Stations, established at South Island, showed the horizontal displacement rates of 41-56 mm/yr. This research confirms the main contribution made to the field of crustal deformation studies, including the updated values of displacements along with their directions over the recent years. The results of this study can be used for further geodynamics investigations as well as for finding the most likely earthquake locations of the current study area.

1. Alif, S. M., Fattah, E. I., Kholil, M. (2020). Geodetic slip rate and locking depth of east Semangko Fault derived from GPS measurement. Geodesy and Geodynamics, 11(3), 222-228.
2. Altıner, Y., Bačić, Ž., Bašić, T., Coticchia, A., Medved, M., Mulić, M., Pavlides, S. (2006). Present-day tectonics in and around the Adria plate inferred from GPS measurements. Postcollisional tectonics and magmatism in the Mediterranean region and Asia, 409, 43-55.
3. Árnadóttir, T., Haines, J., Geirsson, H., Hreinsdóttir, S. (2018). A preseismic strain anomaly detected before M 6 earthquakes in the South Iceland Seismic Zone from GPS station velocities. Journal of Geophysical Research: Solid Earth, 123(12), 11-091.
4. Bartlow, N. M., Wallace, L. M., Beavan, R. J., Bannister, S., Segall, P. (2014). Time‐dependent modeling of slow slip events and associated seismicity and tremor at the Hikurangi subduction zone, New Zealand. Journal of Geophysical Research: Solid Earth, 119(1), 734-753.
5. Beavan, J., Motagh, M., Fielding, E. J., Donnelly, N., Collett, D. (2012). Fault slip models of the 2010-2011 Canterbury, New Zealand, earthquakes from geodetic data and observations of postseismic ground deformation. New Zealand Journal of Geology and Geophysics, 55(3), 207-221.
6. Beavan, J., Wallace, L. M., Palmer, N., Denys, P., Ellis, S., Fournier, N., Denham, M. (2016). New Zealand GPS velocity field: 1995-2013. New Zealand Journal of Geology and Geophysics, 59(1), 5-14.
7. Chetverik, M., Bubnova, O., Babiy, K., Batur, M. (2017). Technogeneous earthquakes and mining operation safety. Geotechnical Mechanics, (136), 127-146. (In Russian).
8. Cremen, G., Galasso, C. (2020). Earthquake early warning: Recent advances and perspectives. Earth-science reviews, 205, 103184.
9. Dumka, R. K., Kotlia, B. S., Kothyari, G. C., Paikrey, J., Dimri, S. (2018). Detection of high and moderate crustal strain zones in Uttarakhand Himalaya, India. Acta Geodaetica et Geophysica, 53(3), 503-521.
10. Hamling, I. J. and Hreinsdóttir, S. (2016). Reactivated afterslip induced by a large regional earthquake, Fiordland, New Zealand. Geophysical Research Letters, 43(6), 2526-2533.
11. Ishchenko, M. V. (2017). Determination of crustal strain in the northern region of Ukraine based on the analysis of GNSS observations. Kinematics and Physics of Celestial Bodies, 33(6), 302-308.
12. Johnson, K. M. (2013). Slip rates and off‐fault deformation in Southern California inferred from GPS data and models. Journal of Geophysical Research: Solid Earth, 118(10), 5643-5664.
13. Johnston, D., Standring, S., Ronan, K., Lindell, M., Wilson, T., Cousins, J., Bissell, R. (2014). The 2010/2011 Canterbury earthquakes: context and cause of injury. Natural Hazards, 73(2), 627-637.
14. Koulali, A., Susilo, S., McClusky, S., Meilano, I., Cummins, P., Tregoning, P., Syafi'i, M. A. (2016). Crustal strain partitioning and the associated earthquake hazard in the eastern Sunda‐Banda Arc. Geophysical Research Letters, 43(5), 1943-1949.
15. Larson, K. M., Lowry, A. R., Kostoglodov, V., Hutton, W., Sánchez, O., Hudnut, K., Suárez, G. (2004). Crustal deformation measurements in Guerrero, Mexico. Journal of Geophysical Research: Solid Earth, 109(B4).
16. Lee, E. S., Lee, Y. W., Park, J. H. (2008). Displacement analysis of the GPS station of Sampali, Indonesia. Earth, planets and space, 60(5), 519-528.
17. Leite, J., Lourenco, P. B., Ingham, J. M. (2013). Statistical assessment of damage to churches affected by the 2010-2011 Canterbury (New Zealand) earthquake sequence. Journal of Earthquake Engineering, 17(1), 73-97.
18. Luginbuhl, M., Rundle, J. B., Turcotte, D. L. (2019). Natural time and nowcasting earthquakes: are large global earthquakes temporally clustered?. In Earthquakes and Multi-hazards Around the Pacific Rim, Vol. II (pp. 137-146). Birkhäuser, Cham.
19. Metzger, S., Jónsson, S., Geirsson, H. (2011). Locking depth and slip-rate of the Húsavík Flatey fault, North Iceland, derived from continuous GPS data 2006-2010. Geophysical Journal International, 187(2), 564-576.
20. Richter, A., Ivins, E., Lange, H., Mendoza, L., Schröder, L., Hormaechea, J. L., Dietrich, R. (2016). Crustal deformation across the Southern Patagonian Icefield observed by GNSS. Earth and Planetary Science Letters, 452, 206-215.
21. Shen, F., Royden, L. H., Burchfiel, B. C. (2001). Large‐scale crustal deformation of the Tibetan Plateau. Journal of Geophysical Research: Solid Earth, 106(B4), 6793-6816.
22. Su, X., Meng, G., Su, L., Wu, W., Liu, T. (2020). Coseismic and early postseismic deformation of the 2016 Mw 7.8 Kaikōura earthquake, New Zealand, from continuous GPS observations. Pure and Applied Geophysics, 177(1), 285-303.
23. Tenzer, R., Stevenson, M., Denys, P. (2012). A compilation of a preliminary map of vertical deformations in New Zealand from continuous GPS data. In Geodesy for Planet Earth (pp. 697-703). Springer, Berlin, Heidelberg.
24. Tretyak, K., Brusak, I. (2022). Modern deformations of Earth crust of territory of Western Ukraine based on "GEOTERRACE" GNSS network data. In Geodynamics, 1(32), 16-25.
25. Yildirim, O., Yaprak, S., Inal, C. (2014). Determination of 2011 Van/Turkey earthquake (M= 7.2) effects from measurements of CORS-TR network. Geomatics, natural hazards and risk, 5(2), 132-144.
26. Zheng, G., Wang, H., Wright, T. J., Lou, Y., Zhang, R., Zhang, W., Wei, N. (2017). Crustal deformation in the India‐Eurasia collision zone from 25 years of GPS measurements. Journal of Geophysical Research: Solid Earth, 122(11), 9290-9312.
27. Zuska, A. V. (2014). Kinematic model of landslide slopes: Monograph. Donetsk: National Mining University, 140. (In Russian).