• 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

N
S
E
W


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

Website

http://creativecommons.org/licenses/

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

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/d0433081-a476-4b8c-af22-b00472614065

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

 
 

Spatial extent

N
S
E
W


Keywords

earthquake catalogue magnitude conversion equation seismic hazard analysis
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

Provided by

Access to the portal
Read here the full details and access to the data.

Associated resources

Not available


  •  
  •  
  •