New Zealand Wide model 2.3 Qs and Qp models for New Zealand, updated for Kaikoura
Creators
- 1. GNS Science, UCalif. Davis
- 2. GNS Science
- 3. ETH Zurich
Description
21-May-2022 There are updated Vp and Vp/Vs models 2.3, which incorporate the results from the Southern South Island region, at zenodo.org/record/6568301
The Qs and Qp New Zealand Wide models 2.3 incorporate the results from the Kaikoura region using aftershocks, published in Geophysical Journal International (Eberhart-Phillips, et al. 2021).
The results from that study have been interpolated and merged into the previous New Zealand Wide model 2.2 (zenodo.org/record/3779523).
The models are provided in tables, where the Spread Function (SF) shows the resolution, such that where SF<4, there is little information.
Qpnzw2p3xyzltln.tbl.txt
Qsnzw2p3xyzltln.tbl.txt
There are also simul format Q files.
Qpnzw2p3.mod.txt
Qsnzw2p3.mod.txt
Map plots of the Q models, resolution and data
KaikouraQ_figures.pdf
Q at any point within the 3D gridded models is defined by linearly interpolating between nodes.
The models use Transverse Mercator coordinate transformation with a central meridian= 173, and counterclockwise rotation of 140. Earth-flattening transformation is used for velocity during ray-tracing. The depths are relative to sea-level.
Reference: Eberhart-Phillips, D., S. Ellis, F. Lanza, and S. Bannister (2021), Heterogeneous material properties – as inferred from seismic attenuation - influenced multiple fault rupture and ductile creep of the Kaikoura Mw 7.8 earthquake, New Zealand, Geophys. J. Int., doi:10.1093/gji/ggab272.
Files
KaikouraQ_figures.pdf
Files
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Additional details
References
- Eberhart-Phillips, D., S. Bannister, and M. Reyners (2017), Deciphering the 3-D distribution of fluid along the shallow Hikurangi subduction zone using P- and S-wave attenuation, Geophys. J . Int., 211, 1032–1045, doi:doi.org/10.1093/gji/ggx348.
- Eberhart-Phillips, D., S. Bannister, and M. Reyners (2020), Attenuation in the mantle wedge beneath super-volcanoes of the Taupo Volcanic Zone, New Zealand, Geophys. J. Int., 220, 703-723, doi: 10.1093/gji/ggz455.
- Eberhart-Phillips, D., and B. Fry (2017), A new scheme for joint surface wave and earthquake travel-time inversion and resulting 3-D velocity model for the western North Island, New Zealand, Phys. Earth and Plan. Int., 269, 98–111, doi:10.1016/j.pepi.2017.05.014.
- Eberhart-Phillips, D., M. Reyners, and S. Bannister (2015), A 3-D Qp attenuation model for all of New Zealand, Seis. Res. Lett., 86, 1655-1663, doi:10.1785/0220150124.
- Eberhart-Phillips, D., M. Reyners, P. Upton, and D. Gubbins (2018), Insights into the crustal structure and tectonic history of the southern South Island, New Zealand, from the 3-D distribution of P- and S-wave attenuation, Geophys. J . Int., 214, 1481-1505, doi:10.1093/gji/ggy194.
- Eberhart-Phillips, D., S. Bannister, and S. Ellis (2014), Imaging P and S attenuation in the termination region of the Hikurangi subduction zone, New Zealand, Geophys. J . Int., 198, 516-536, doi: 510.1093/gji/ggu1151.
- Gardner, G. H. F., L. W. Gardner, and A. R. Gregory (1974), Formation velocity and density - the diagnostic basics for stratigraphic traps, Geophysics, 39, 770-780.
- Henrys, S., D. Eberhart‐Phillips, Bassett, D., Sutherland, R., Okaya, D., Savage, M., et al. (2020), Upper plate heterogeneity along the southern Hikurangi Margin, New Zealand, Geophys. Res. Let., 47, e2019GL085511., doi:10.1029/2019GL085511.
- Hill, D. P. (1978), Seismic evidence for the structure and Cenozoic tectonics of the Pacific Coast States, in Cenozoic Tectonics and Regional Geophysics of the Western Cordillera, edited by R. B. Smith and G. P. Eaton, pp. 145-174.
- Eberhart-Phillips, D., S. Ellis, F. Lanza, and S. Bannister (2021), Heterogeneous material properties – as inferred from seismic attenuation - influenced multiple fault rupture and ductile creep of the Kaikoura Mw 7.8 earthquake, New Zealand, Geophys. J. Int., doi:10.1093/gji/ggab272.