Seismic hazard mapping of Papua New Guinea — 2019 revision

In this study, we performed a probabilistic seismic hazard assessment (PSHA) for Papua New Guinea (Figure 1) to underpin a revision of the seismic zoning map for the national building code of PNG (Figure 2).


To perform PSHA, we compiled a composite catalogue for the period of 1900-2017 (Figure 3). We then developed magnitude conversion equations to homogenize the catalogue in terms of moment magnitude scale (M<sub> W</sub> , Figure 4).


In contrast to previous studies in PNG (e.g. Ghasemi et. al, 2016), we developed a seismotectonic model that includes 18 fault models (Figure 5) combined with the distributed seismicity (Figure 6) to model earthquake sources.


Following the classical PSHA methodology, we mapped the seismic hazard in terms of peak ground acceleration (PGA) with 10% probability of exceedance in 50 years (Figure 1). We also computed hazard curves (Figure 7) and uniform hazard spectra (Figure 8) at the location of major population centres in PNG (black circles in Figure 1).


Results of this study indicate a high level of hazard in the coastal areas of Huon Peninsula and New Britain–Bougainville regions and a relatively low level of hazard in the southwestern part of Papua New Guinea.


To identify earthquake sources that are contributing most to the overall hazard, we performed hazard disaggregation analysis for all of the major localities in PNG (e.g. Figure 9).


Results of the hazard disaggregation analysis shows that in the Huon Peninsula region, the frequent moderate to large earthquakes occurring on the Ramu-Markham Fault Zone results in high seismic hazard (Figure 9). The New Britain–Bougainville region also has relatively high seismic hazard. The proximity to the subduction zone of the New Britain Trench is the main influence on the calculated level of hazard

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Date (Creation)
2019-02-01
Date (Publication)
2024-05-03T02:35:45
Citation identifier
ga-dataSetURI/http://pid.geoscience.gov.au/document/ga/127500

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Commonwealth of Australia (Geoscience Australia)

 Voice
Author

Ghasemi, H.

 Place and Communities Internal Contact
Author

Cummins, P.

 Place and Communities Internal Contact
Author

Weatherill, G.

 External Contact
Author

McKee, C.

 External Contact
Author

Hazelwood, M.

 Place and Communities Internal Contact
Author

Allen, T.

 Place and Communities Internal Contact
Purpose

Poster

Status
Completed
Point of contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

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Place and Communities Division

 External Contact
Author

Ghasemi, H.

 Place and Communities Internal Contact
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  • Geoscientific information

Extent

Extent

N
S
E
W


Maintenance and update frequency
As needed

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Title

Product data repository: Various Formats

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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

theme.ANZRC Fields of Research.rdf

  • EARTH SCIENCES

{1}

  • Seismic hazard assessment

{1}

  • seismotectonic model

{1}

  • Pacific Nations

{1}

  • Hazard Response

{1}

  • Natural Hazards

{1}

  • earthquakes

{1}

  • Papua New Guinea - PNG

{1}

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

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© Commonwealth of Australia (Geoscience Australia) 2019

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Unclassified
Language
English
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UTF8

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Commonwealth of Australia (Geoscience Australia)

 Voice facsimile
OnLine resource

Download Poster (pptx) [17.6 MB]

Download Poster (pptx) [17.6 MB]

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  • pptx

    File decompression technique

    nil

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Document

Metadata constraints

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Unclassified

Metadata

Metadata identifier
urn:uuid/de9cd8ed-5dfd-4311-8d23-1b36d29791a9

Title

GeoNetwork UUID

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Resource scope
Document
Name

Poster

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/127500

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https://ecat.ga.gov.au:8080/geonetwork/srv/eng//metadata/add5bc51-dd4d-408c-8c1b-deebaacf6efe

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng//metadata/de9cd8ed-5dfd-4311-8d23-1b36d29791a9

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/de9cd8ed-5dfd-4311-8d23-1b36d29791a9

Metadata linkage

https://ecat.ga.gov.au/geonetwork/static/eng/catalog.search#/metadata/de9cd8ed-5dfd-4311-8d23-1b36d29791a9

Date info (Creation)
2018-05-04T03:37:56
Date info (Revision)
2018-05-04T03:38:12

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

Hazard Response Natural Hazards Pacific Nations Papua New Guinea - PNG Published_External Seismic hazard assessment earthquakes seismotectonic model
theme.ANZRC Fields of Research.rdf
EARTH SCIENCES

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