Product catalogue
Site characterisation of twelve seismic monitoring stations in South East Victoria, Australia
Spatially heterogeneous ground motions generated by earthquakes are partially attributed to near surface conditions (i.e., site response), quantification of which enables the selection and calibration of region-specific ground-motion models (GMMs) used in seismic hazard assessments. The 21 September 2021 MW 5.9 earthquake, the largest magnitude earthquake instrumentally recorded in Victoria, was well recorded across the University of Melbourne’s seismic network (UMSN) in eastern Victoria, providing a rare opportunity to assess the utility of published GMMs for large-magnitude earthquakes, and thereby improve seismic hazard assessment in the region. To benchmark these ground-motion recordings, estimating seismic site response is required, in support of which we present results of site characterisation for 12 UMSN.
The analysis of surface wave components of ambient noise using microtremor surveys can provide well constrained shear-wave velocity models for the uppermost few hundred metres of the subsurface. By combining spatially averaged coherency (SPAC) and frequency-wavenumber (FK) array techniques, we retrieve multimode Rayleigh and Love phase velocity dispersion curves and Rayleigh-wave ellipticity, which we jointly invert for site-specific, near-surface shear wave velocity models. Previous studies demonstrate that incorporating dispersion of Love waves in the inversions provide stronger constraints of the uppermost shear-wave velocity structure. These inversions produced a set of representative 1-D shear wave velocity profiles for each site, which will contribute to the Australian Ground-Motion Database - a national repository of earthquake ground-motion data and site metadata for engineering applications.
Presented at the 2023 Australian Earthquake Engineering Society (AEES) National Conference
Simple
Identification info
- Date (Creation)
- 2023-06-05
- Date (Publication)
- 2024-05-23T04:03:10
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/149645
Identifier
- Codespace
-
Digital Object Identifier
- Cited responsible party
-
Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Ebrahimi, R.
External Contact Author Allen, T.
Place and Communities Internal Contact Author Jones, A.
External Contact Author Ghasemi, H.
Place and Communities Internal Contact Author Attanayake, J.
External Contact
- Name
-
Australian Earthquake Engineering Society (AEES) Conference, 23-25 November 2023, Brisbane, QLD
- Purpose
-
Paper to be submitted to 2023 Australian Earthquake Engineering Society Annual Conference
- Status
- Completed
- Point of contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Resource provider Place and Communities Division
External Contact Point of contact Allen, T.
Place and Communities Internal Contact
- Spatial representation type
- Topic category
-
- Geoscientific information
Extent
Extent
))
- Maintenance and update frequency
- As needed
Resource format
- Title
-
Product data repository: Various Formats
- Website
-
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
- theme.ANZRC Fields of Research.rdf
-
-
EARTH SCIENCES
-
- Keywords
-
-
shear wave velocity
-
- Keywords
-
-
joint inversion,
-
- Keywords
-
-
ellipticity curve
-
- Keywords
-
-
dispersion curve
-
- Keywords
-
-
site effects
-
- Keywords
-
-
Published_External
-
Resource constraints
- Title
-
Creative Commons Attribution 4.0 International Licence
- Alternate title
-
CC-BY
- Edition
-
4.0
- Access constraints
- License
- Use constraints
- License
- Other constraints
-
(c) Commonwealth of Australia (Geoscience Australia) 2023
Resource constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
- Language
- English
- Character encoding
- UTF8
Distribution Information
- Distributor contact
-
Role Organisation / Individual Name Details Distributor Commonwealth of Australia (Geoscience Australia)
Voice facsimile
- OnLine resource
-
Link to Conference Page
Link to Conference Page
- Distribution format
-
- OnLine resource
-
Link to Paper
Link to Paper
- Distribution format
-
Resource lineage
- Statement
-
Paper to be submitted to 2023 Australian Earthquake Engineering Society Annual Conference
Metadata constraints
- Title
-
Australian Government Security Classification System
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/acd2aace-7237-42d2-ba99-b1e03d307769
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice Owner Allen, T.
Place and Communities Internal Contact Point of contact Allen, T.
Place and Communities Internal Contact
Type of resource
- Resource scope
- Document
- Name
-
Conference Abstract
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/149645
- Date info (Creation)
- 2019-04-08T01:55:29
- Date info (Revision)
- 2019-04-08T01:55:29
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