Product catalogue
Tomographic model of the Australian region from seismic full waveform inversion
<div>Recent studies have demonstrated that understanding the lithospheric structure is crucial for resource exploration, as errors in model interpretation can lead to significant financial losses. Tomographic images play a key role in constructing lithospheric models. Previous seismic tomographic models were developed using sparse broad-band receiver coverage in Australia, limiting the resolution and reliability of these models. Additionally, the source datasets and associated error estimates are often unavailable, making it difficult to assess the accuracy and resolution power of the models. Therefore, there is a growing need for a fully verifiable lithospheric model of Australia that utilizes national-scale legacy data assimilation and the deployment of new seismic stations to ensure standardized and quality-controlled national data coverage. Geoscience Australia has committed to producing such a model using data from improved national station coverage and sharing all results and datasets involved in model building. A relatively uniform station coverage over the Australian landmass has been achieved with the addition of the currently operated 2-degree (~222 km) grid continental-scale Australian Passive Seismic Array Project (AusArray) deployment, which includes stations installed in previously inaccessible regions. Full waveform inversion (FWI) was selected to create the Australian tomographic models. </div><div><br></div><div>Our database combines records obtained across Australia and the surrounding region. It spans from 1997 to 2023. The dataset underwent a thorough quality check and records for 358 earthquakes registered at 660 seismic stations were extracted for further FWI imaging. Our tomographic image reveals well known subduction zones visible as high velocity belts around Australia showing the structure of ~100 km thickness. The Australian lithosphere in the west is of higher seismic velocity than the east, in general, in agreement with the most tomographic models published previously. However, our results exhibit significantly higher granularity than the previous studies. Adding further earthquakes with lower magnitudes and further AusArray data as it becomes available will continue to improve the model accuracy and resolution.
Presented at the 2024 Australian Society of Exploration Geophysicists (ASEG) Discover Symposium
Simple
Identification info
- Date (Creation)
- 2024-07-15T08:00:00
- Date (Publication)
- 2024-10-30T21:35:49
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/149751
- Cited responsible party
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Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Holzschuh, J.
Internal Contact Author Gorbatov, A.
Internal Contact Author Hejrani, B.
Internal Contact Author Hassan, R.
Internal Contact
- Name
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Australian Society of Exploration Geophysicists (ASEG) 2024 Discover Symposium 15-18 October 2024 Hobart, Tasmania
- Purpose
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Abstract for ASEG Discover Symposium 15-18 October 2024
- Status
- Completed
- Point of contact
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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 Holzschuh, J.
Internal Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- Not planned
Resource format
- Title
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Product data repository: Various Formats
- Website
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Data Store directory containing the digital product files
Data Store directory containing one or more files, possibly in a variety of formats, accessible to Geoscience Australia staff only for internal purposes
- Project
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EFTF – Exploring for the Future
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- Project
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AusArray - The Australian Passive Seismic Array Project
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- Keywords
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AusArray
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- Keywords
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passive seismic
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- Keywords
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Full waveform inversion
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- theme.ANZRC Fields of Research.rdf
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Seismology and Seismic Exploration
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- Keywords
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Published_External
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Resource constraints
- Title
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Creative Commons Attribution 4.0 International Licence
- Alternate title
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CC-BY
- Edition
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4.0
- Access constraints
- License
- Use constraints
- License
- Other constraints
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(c) Commonwealth of Australia (Geoscience Australia) 2024
Resource constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Classification system
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Australian Government Security Classification System
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
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Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
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Link to Conference Page
Link to Conference Page
- Distribution format
-
- OnLine resource
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Link to Conference Handbook
Link to Conference Handbook
- Distribution format
-
- OnLine resource
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Link to Abstract (page 67)
Link to Abstract (page 67)
- Distribution format
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- OnLine resource
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Download Presentation (pptx) [36.1 MB]
Download Presentation (pptx) [36.1 MB]
- Distribution format
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pptx
- File decompression technique
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nil
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Resource lineage
- Statement
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<div>This abstract describes full waveform modelling using AusArray and other data, to be presented at the ASEG symposium.</div>
Metadata constraints
- Title
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Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/7b9cdba2-ee76-4631-b106-beba236b157c
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
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Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Point of contact Holzschuh, J.
Internal Contact
Type of resource
- Resource scope
- Document
- Name
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Conference Abstract
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/149751
- Date info (Creation)
- 2024-10-22T05:59:28
- Date info (Revision)
- 2024-10-22T05:59:28
Metadata standard
- Title
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AU/NZS ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-1:2014
Metadata standard
- Title
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ISO 19115-3
- Title
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Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
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Version 2.0, September 2018
- Citation identifier
- http://pid.geoscience.gov.au/dataset/ga/122551