Surface-wave Velocity Mapping of the Delamerian Region

<div>To investigate shallow crustal structure across the Delamerian region, this study generates a surface-wave phase velocity map at 1.6 s period. This ambient-noise derived map of surface wave velocity is the shortest period map yet produced for Australia with even data coverage. This map provides velocity values sensitive to the uppermost few kilometres of the crust (~ top 2 km), allowing direct comparison with the distribution of basins and bedrock near the surface.</div><div><br></div><div><br></div>

Simple

Identification info

Date (Creation)
2025-11-24
Date (Publication)
2025-12-15T06:02:26.483Z
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/150778

Identifier

Code
10.26186/150778
Codespace

doi.org

Description

Digital Object Identifier (DOI)

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Commonwealth of Australia (Geoscience Australia)

 Voice
Author

Hejrani, B.

 Internal Contact
Purpose

This product provides a shallow-crust surface-wave velocity map for the Delamerian region, derived from ambient seismic noise. The seismic data were acquired during the Exploring for the Future program's AusArray deployment and the Australian National Seismograph Network. The dataset reliably distinguishes low-velocity sedimentary basins from high-velocity bedrock near the surface, demonstrating strong agreement with known geology. It is fit-for-purpose for regional geological interpretation, basin mapping, and shallow crustal studies.

Status
Completed
Point of contact
Role Organisation / Individual Name Details
Resource provider

Minerals, Energy and Groundwater Division

 External Contact
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Point of contact

Hejrani, B.

 Internal Contact
Spatial representation type
Topic category
  • Geoscientific information

Extent

N
S
E
W


Maintenance and update frequency
Not planned

Resource format

Title

Product data repository: Various Formats

Protocol

FILE:DATA-DIRECTORY

Name of the resource

Data Store directory containing the digital product files

Description

Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes

Keywords

  • surface wave maps

  • DPAP_151332

Keywords

  • Ambient Noise Tomography

Keywords

  • AusArray

Keywords

  • Delamerian

Project

  • Seismic and Magnetotellurics

  • Deep dive projects

  • Australia-wide geoscience data

  • EFTF – Exploring for the Future

  • Resourcing Australia's Prosperity

  • Delamerian Deep Dive

  • Australia’s Resources Framework

theme.ANZRC Fields of Research.rdf

  • Seismology and Seismic Exploration

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

https://creativecommons.org/licenses/by/4.0/

Addressee
Role Organisation / Individual Name Details
User

Any
Use constraints
License
Use constraints
Other restrictions
Other constraints

© Commonwealth of Australia (Geoscience Australia) 2025

Resource constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/pspf-annual-release

Classification
Unclassified
Classification system

Australian Government Security Classification System

Associated resource

Association Type
Larger work citation
Title

Delamerian Project: Achievements Report

Website

Language
English
Character encoding
UTF8

Distribution Information

OnLine resource

Download the data (csv) [342 KB]

Download the data (csv) [342 KB]

OnLine resource

Download the report (pdf) [1.2 MB]

Download the report (pdf) [1.2 MB]

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

 Voice

Resource lineage

Statement

<div>The dataset originates from continuous broadband seismic data collected by the AusArray 2 by 2 degree deployment (during the Exploring for the Future program) and Australian National Seismograph Network. These data were processed to generate Noise Correlation Functions following established ambient-noise procedures, including temporal normalisation, spectral whitening, cross-correlation, and linear stacking using the HiPerSeis software ( https://github.com/GeoscienceAustralia/hiperseis). Phase-velocity dispersion curves between all station pairs were then automatically extracted using an in-house semi-automated algorithm based on Aki’s (1957) spectral formulation and refined using methods described in Hejrani et al. (2023). The dispersion measurements were subsequently inverted using 2-D surface-wave tomography (Rawlinson & Sambridge, 2005, 2012) to produce the 1.6-s Rayleigh-wave velocity map. No further transformations have been applied beyond standard quality control and map generation. </div><div><br></div><div>This surface wave map is a piece in the ambient noise tomography of the Australian continent, which will be fully delivered by June 2027. </div>

Metadata constraints

Title

Australian Government Security Classification System

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/pspf-annual-release

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/4eb5bc03-25fb-4300-9b8f-ba4eb9ed23cb

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice
Point of contact

Hejrani, B.

 Internal Contact

Type of resource

Resource scope
Dataset

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with uuid

Citation identifier
eCatId/150778

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/api/records/4eb5bc03-25fb-4300-9b8f-ba4eb9ed23cb

Date info (Creation)
2025-12-15T06:23:01.278Z
Date info (Creation)
2025-11-24T06:22:21.028Z
Date info (Revision)
2026-06-21T22:26:23.556Z

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

Australia-wide geoscience data Australia’s Resources Framework Deep dive projects Delamerian Deep Dive EFTF – Exploring for the Future Resourcing Australia's Prosperity Seismic and Magnetotellurics
theme.ANZRC Fields of Research.rdf
Seismology and Seismic Exploration

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Access to the portal

Associated resources

Not available