New Zealand Wide model 2.3 Qs and Qp models for New Zealand, updated for Kaikoura

19-Sept-2024 Full uncompressed versions of the New Zealand Wide 2.3 velocity, Qs and Qp model Tables can be obtained from zenodo.org/records/13799996

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.