NDLI: Probabilistic seismic hazard map of Papua New Guinea

Content Provider	Springer Nature Link
Author	Ghasemi, Hadi McKee, Chris Leonard, Mark Cummins, Phil Moihoi, Mathew Spiro, Spiliopoulos Taranu, Felix Buri, Eric
Copyright Year	2016
Abstract	We developed a probabilistic seismic hazard map of Papua New Guinea expressed in terms of peak ground acceleration with return period of 475 years. The calculations were performed for bedrock site conditions (Vs30 = 760 m/s). A logic-tree framework was applied to include epistemic uncertainty in the seismic source as well as ground motion modelling processes. Two seismic source models were developed using area source zones and smoothed seismicity, respectively. Based on available geological and seismological data, defined seismic sources were classified into four different tectonic environments. For each of the tectonic regimes three ground motion prediction equations were selected and used to estimate the ground motions at a grid of sites with spacing of 0.1° in latitude and longitude. Results show 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. Seismic hazard disaggregation results show that in the Huon Peninsula region high seismic hazard is caused by modelled frequent moderate to large earthquakes occurring on the Ramu-Markham Fault Zone. In the New Britain–Bougainville region the distance to the subduction zone associated with the New Britain Trench mainly controls the calculated level of hazard. It is also shown that the estimated level of peak ground acceleration is very sensitive to the selection of ground motion prediction equations. Overall our results differ significantly from those of previous studies, and we surmise that these differences are due to our use of modern ground motion prediction equations and earthquake source information.
Starting Page	1003
Ending Page	1025
Page Count	23
File Format	PDF
ISSN	0921030X
Journal	Natural Hazards
Volume Number	81
Issue Number	2
e-ISSN	15730840
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-01-20
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Papua New Guinea Seismic hazard assessment Peak ground acceleration Natural Hazards Hydrogeology Geophysics/Geodesy Geotechnical Engineering & Applied Earth Sciences Civil Engineering Environmental Management
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science Water Science and Technology

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