Product catalogue
Testing the sensitivity of new Australian empirical magnitude conversion equations on seismic hazard analyses
Because all modern ground motion prediction equations (GMPEs) are now calibrated to the moment magnitude scale MW, it is essential that earthquake rates are also expressed in terms of moment magnitudes for probabilistic seismic hazard analyses. However, MW is not routinely estimated for earthquakes in Australia because of the low-to-moderate level of seismicity, coupled with the relatively small number of seismic recording stations. As a result, the Australian seismic catalogue has magnitude measures mainly based on local magnitudes, ML. To homogenise the earthquake catalogue based on a uniform MW, a “reference catalogue” that includes earthquakes with available MW estimates was compiled. This catalogue consists of 240 earthquakes with original MW values between 2.0 and 6.58. This reference catalogue served as the basis for the development of magnitude conversion equations between MW and other magnitude scales: ML, body-wave magnitude mb, and surface-wave magnitude MS. The conversions were evaluated using general orthogonal regression (GOR), which accounts for measurement errors in the x and y variables, and provides a unique solution that can be used interchangeably between magnitude types. The impact of the derived magnitude conversion equations on seismic hazard is explored by generating synthetic earthquake catalogues and computing seismic hazard level at an arbitrary site. The results indicate that we may expect up to 20-40% reduction in PGA hazard, depending on the selection and application process of the magnitude conversion equations.
Abstract submitted to and presented at the 2017 Australian Earthquake Engineering Society (AEES) Conference
Simple
Identification info
- Date (Creation)
- 2017-09-12T15:22:00
- Date (Publication)
- 2024-05-03T02:29:01
- Citation identifier
- Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/113821
- Cited responsible party
-
Role Organisation / Individual Name Details Publisher Commonwealth of Australia (Geoscience Australia)
Voice Author Ghasemi, H.
Place and Communities Internal Contact Author Allen, T.
Place and Communities Internal Contact
- Name
-
Australian Earthquake Engineering Society (AEES) Conference, 24-26 November 2017, Canberra, ACT
- Purpose
-
Presented at the 2017 Australian Earthquake Engineering Society (AEES) 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 Ghasemi, H.
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
-
-
earthquake catalogue
-
- Keywords
-
-
seismic hazard analysis
-
- Keywords
-
-
magnitude conversion equation
-
- 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
-
© Commonwealth of Australia (Geoscience Australia) 2017
Resource constraints
- 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 Abstract
Link to Abstract
- Distribution format
-
Resource lineage
- Statement
-
Presented at the 2017 Australian Earthquake Engineering Society (AEES) Conference
- Hierarchy level
- Dataset
Metadata constraints
- Classification
- Unclassified
Metadata
- Metadata identifier
-
urn:uuid/d0433081-a476-4b8c-af22-b00472614065
- Title
-
GeoNetwork UUID
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/113821
- Metadata linkage
-
https://internal.ecat.ga.gov.au/geonetwork/srv/eng/search?uuid=d0433081-a476-4b8c-af22-b00472614065
Point-of-truth metadata URL
- Date info (Creation)
- 2017-09-12T05:18:36
- Date info (Revision)
- 2017-09-12T22:30:54
Metadata standard
- Title
-
AU/NZS ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-1:2014
Metadata standard
- Title
-
ISO 19115-3
- Edition date
- 2015-07-01T00:00:00
- Title
-
Geoscience Australia Community Metadata Profile of ISO 19115-1:2014
- Edition
-
Version 2.0, April 2015