Supporting Information for "Investigation of Hikurangi subduction zone slow slip events using onshore and onshore geodetic data" PhD thesis

The data sets included here are those inverted using the TDEFNODE (McCaffrey et al., 2009) inversion code in the PhD thesis "Investigation of Hikurangi subduction zone slow slip events using onshore and onshore geodetic data" to obtain geodetic slip models of the 2013-2016 and February-July 2019 periods at the Hikurangi subduction zone.

The 2013-2016 period captured the 2013 Kāpiti and 2014/2015 Manawatū slow slip events (SSEs), in addition to the 2013 Cook Strait, 2013 Lake Grassmere, and 2014 Eketāhuna earthquakes. The data related to this model are:

campaign_gps_2013.ts
-campaign GPS time series
-columns: Year  East East_sigma North North_sigma Up Up_sigma
-input using TDEFNODE command ts1

coseismic_displacements_2013_07_21.ds
-coseismic displacements for Cook Strait earthquake (Hamling et al., 2014)
-columns: Longitude  Latitude  Disp_East Disp_North Sigma_East Sigma_North Site Disp_Up Sigma_Up Time1 Time2
-input using TDEFNODE command ds2

coseismic_displacements_2013_08_16.ds
-coseismic displacements for Lake Grassmere earthquake (Hamling et al., 2014)
-columns: Longitude  Latitude  Disp_East Disp_North Sigma_East Sigma_North Site Disp_Up Sigma_Up Time1 Time2
-input using TDEFNODE command ds2

onshore_gnss_kapiti_manawatu_2013_2016.ts
-GNSS time series
-columns: Year  East East_sigma North North_sigma Up Up_sigma
-input using TDEFNODE command ts1

LOS_coseismic_2013_08_16.is
-coseismic Line of Sight displacements for Lake Grassmere earthquake (Hamling et al., 2014)
-convention: negative displacement equivalent to ground moving towards the satellite
-columns: Longitude  Latitude  LineOfSight_disp sigma  Unit_x Unit_y Unit_z
-input using TDEFNODE command is1

Data related to the February-July 2019 SSE model are:

onshore_gnss_east_coast_sse_2019.ts
-GNSS time series
-columns: Year  East East_sigma North North_sigma Up Up_sigma
-input using TDEFNODE command ts4

seafloor_displacement_gisborne.ts
-seafloor pressure time series
-convention: positive change equivalent to seafloor uplift
-columns: Year  East East_sigma North North_sigma Up Up_sigma
-input using TDEFNODE command ts4

seafloor_displacement_hawkebay.ts
-seafloor pressure time series
-convention: positive change equivalent to seafloor uplift
-columns: Year  East East_sigma North North_sigma Up Up_sigma
-input using TDEFNODE command ts4

LOS_SSE_2019.is
-SSE-related Line of Sight displacement
-convention: positive displacement equivalent to ground moving away from satellite
-columns: Longitude  Latitude  LineOfSight_disp sigma  Unit_x Unit_y Unit_z
-input using TDEFNODE command is1

The TDEFNODE manual can be found here:
https://robmccaffrey.github.io/TDEFNODE/manual/tdefnode_manual.html

The header lines in the time series files (.ts) take the site inter-SSE rates from the model of Wallace et al. (2012).

References

Hamling, I. J., D’Anastasio, E., Wallace, L. M., Ellis, S., Motagh, M., Samsonov, S., Palmer, N., and Hreinsdóttir, S. (2014). Crustal deformation and stress transfer during a propagating earthquake sequence: The 2013 Cook Strait sequence, central New Zealand. Journal of Geophysical Research: Solid Earth, 119(7):6080–6092.

McCaffrey, R. (2009). Time-dependent inversion of three-component continuous GPS for steady and transient sources in northern Cascadia. Geophysical Research Letters, 36(L07304).

Wallace, L. M., Barnes, P., Beavan, J., Van Dissen, R., Litchfield, N., Mountjoy, J., Langridge, R., Lamarche, G., and Pondard, N. (2012). The kinematics of a transition from subduction to strike-slip: An example from the central New Zealand plate boundary. Journal of Geophysical Research: Solid Earth, 117(B2).