Some empirical relations for attenuation of ground-motion spectral amplitudes in Southwestern Western Australia
A dataset comprising some 260 seismograph and accelerograph records from 67 events of the Burakin 2001-02 earthquake sequence was compiled to develop regional ground-motion models for southwestern Western Australia. Events range in size from moment magnitude 2.3 - M - 4.6. The decay of spectral amplitudes can be approximated by a geometrical spreading coefficient of R-1.05 within 80 km of the source. The associated model for the regional seismic quality factor can be expressed as Q(f) = 290f1.09.
These attenuation parameters are subsequently used to evaluate average source parameters for the 67 earthquakes. For the observed magnitude range, data demonstrates a seismic moment (M0) - local magnitude (ML) relation following: log M0 = 1.14 ML + 10.45, where M0 is in N-m. Average corner frequencies for these events do not vary significantly with M0 particularly for events M > 3.0, chiefly ranging between 2-3 Hz. This gives rise to anomalously low stress drops for lower magnitudes (M < 4.0) that increase at larger magnitudes.
Simple
Identification info
- Date (Publication)
- 2004-01-01T00:00:00
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/69524
- Cited responsible party
-
Role Organisation / Individual Name Details Author Allen, T.I.
1 Author Dhu, T.
2 Author Cummins, P.R.
3 Author Schneider, J.
4
- Point of contact
-
Role Organisation / Individual Name Details Custodian MNHD
Owner Commonwealth of Australia (Geoscience Australia)
Custodian Commonwealth of Australia (Geoscience Australia)
Voice
- Topic category
-
- Geoscientific information
Extent
))
- Maintenance and update frequency
- Unknown
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
- Keywords
-
-
GA Publication
-
Report
-
- Theme
-
-
earthquakes
-
- Keywords
-
-
AU-WA
-
- Australian and New Zealand Standard Research Classification (ANZSRC)
-
-
Earth Sciences
-
- 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
Resource constraints
- Title
-
Australian Government Security ClassificationSystem
- 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
- OnLine resource
-
Download the file (pdf)
Download the file (pdf)
- Distribution format
-
-
pdf
-
Resource lineage
- Statement
-
Unknown
- Hierarchy level
- Non geographic dataset
- Other
-
GA Publication
- Description
-
Source data not available.
Metadata constraints
- Title
-
Australian Government Security ClassificationSystem
- Edition date
- 2018-11-01T00:00:00
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/a05f7892-eddb-7506-e044-00144fdd4fa6
- Title
-
GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
- Contact
-
Role Organisation / Individual Name Details Point of contact Commonwealth of Australia (Geoscience Australia)
Voice
Type of resource
- Resource scope
- Non geographic dataset
- Name
-
nonGeographicDataset
Alternative metadata reference
- Title
-
Geoscience Australia - short identifier for metadata record with
uuid
- Citation identifier
- eCatId/69524
- Date info (Revision)
- 2018-04-20T06:20:04
- Date info (Creation)
- 2009-09-14T00:00:00
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