Data Services Products: EMC-Banda_ANT_CrustVs_2020 A 3-D crustal shear wave velocity model in the Banda Arc collision zone from ambient noise tomography

Summary

Banda_ANT_CrustVs_2020 is a 3-D crustal shear wave velocity model in the Banda Arc collision zone from ambient noise tomography with ~4-year data from 30 temporary broadband seismometers (YS array) deployed in the Nuna Tenggara Timur region of Indonesia and Timor-Leste, augmented by data of three permanent stations (GE network) in the region.

Description

Name Banda_ANT_CrustVs_2020
Title A 3-D crustal shear wave velocity model in the Banda Arc collision zone from ambient noise tomography
Type 3-D Tomography Earth Model
Sub Type Shear wave velocity (km/s)
Year 2020
Data Revision r0.0 (revision history)
 
Short Description   Banda_ANT_CrustVs_2020 is based on ambient noise tomography with ~4-year data from the Banda Arc passive seismic experiment consisting of 30 broadband instruments (YS array) in the Nuna Tenggara Timur region of Indonesia and Timor-Leste (latitude 7.5°S-11.25°S, longitude 117.5°E-128.5°E), augmented by data from three permanent seismic stations of the GE network in the region.
 
Authors: Ping Zhang, Research School of Earth Sciences, Australian National University, Canberra, Australia

Meghan S. Miller, Research School of Earth Sciences, Australian National University, Canberra, Australia
 
Previous Model None
 
Reference Model None
 
Model Download Banda-ANT-CrustVs-2020.r0.0.nc (see metadata) in the Polar Stereographic Projection and in netCDF 3 Classic format.
 
Depth Coverage 0 – 65 km (best resolution <50 km)
 
Area Banda Arc (latitude: 7.5°-11.25° South and longitude is 117.5°-128.5° East)
 
Data Set Description The 3-D Vs model in the crust and uppermost mantle is based on Rayleigh wave phase velocity dispersions (6-37 s) measured from continuous data from March 2014 to December 2018 (~4 years) recorded by 33 stations in the Banda Arc region and a 3-D surface wave direct inversion algorithm. Details are in Zhang and Miller, (2020).
 
 
Model Resolution Description;  Checkerboard tests with checker size of 0.75° by 0.75° show that the Vs model in upper 50 km can be reasonably resolved in regions where data coverage is dense with lateral resolution of ~60-80 km, although varying degrees of smearing are observed. Please refer to Zhang and Miller, (2020) for checkerboard test images and more details.

Seismic stations
Figure 1. Topography map of the Banda Arc collision zone and seismic stations of the YS array (inverted yellow triangles) and the GE network (inverted blue triangles) used for the ambient noise tomography. Inset is a regional map, in which the study region is outlined by the red rectangular box. Modified from Figure 1 in Zhang and Miller (2020)..

Horizontal and vertical slices
Figure 2. Images of the 3-D Vs model in the crust and uppermost mantle. (a) Horizontal slices at depths of 5 km, 15 km, 25 km, and 35 km for the model. (b) NW-to-SE orientated vertical profiles through the model, with topography on the top. Locations of the profiles (A-D) are marked as black lines in the top panel in (a). Modified from Figure 2 in Zhang and Miller (2020).

Citations and DOIs

To cite the original work behind this Earth model:

  • Zhang, P., and Miller, M.S., (2020) Seismic imaging of the subducted Australian Continental Margin beneath Timor and the Banda Arc collision zone, Accepted by GRL on November 24, 2020.

  • Meghan S. Miller, Leland J. O’Driscoll, Nova Roosmawati, Cooper W. Harris, Robert W. Porritt, Sri Widiyantoro, Luis Teofilo da Costa, Eugenio Soares, Thorsten W. Becker, A. Joshua West; Banda Arc Experiment—Transitions in the Banda Arc‐Australian Continental Collision. Seismological Research Letters ; 87 (6): 1417–1423. https://doi.org/10.1785/0220160124

To cite IRIS DMC Data Products effort:

  • Trabant, C., A. R. Hutko, M. Bahavar, R. Karstens, T. Ahern, and R. Aster (2012), Data Products at the IRIS DMC: Stepping Stones for Research and Other Applications, Seismological Research Letters, 83(5), 846–854, https://doi.org/10.1785/0220120032.

DOI for this EMC webpage: https://doi.org/10.17611/dp/emc.2020.bandaantcvs.1

Credits

  • r0.0 model provided by Ping Zhang.

Revision History

revision r0.0: uploaded December 7, 2020.

Categories

02:06:35 v.d6084d45