Abstract

Improved regional seismograph coverage in the 1970s has enhanced the resolution of the seismicity of the southern highlands of Papua New Guinea. Two zones can be defined. The Southern Highlands Seismic Zone follows the Papuan Fold Belt and extends from Kerema on the Gulf of Papua through the Star Mountains region into Irian Jaya. A second zone, the Mount Hagen Seismic Zone, plunges to the north-northeast from the Southern Highlands Seismic Zone south of Mount Hagen to intersect the intermediate-depth seismicity beneath the Ramu-Markham Valley. The southern highlands earthquakes reflect continuing Pliocene-Quaternary thrust faulting in the crust of the Indo-Australian Plate , brought about by the collision of the Indo-Australian and South Bismarck Plates over the sinking Solomon Sea Plate. Relief of compressive stress is through fracturing of the continental plate margin. The zone of fracture is now manifest in the Papuan Fold Belt. Seismic risk in the Southern Highlands Seismic Zone is less than that of the north coast, New Britain, and Bougainville, but is still high. The once-a-year largest earthquake is of magnitude 4.7, the ten-year earthquake magnitude 6.2, and the 30-year earthquake magnitude 6.9, which compare with the Californian figures of 5.7, 6.9, and 7.4, respectively. Large earthquakes are expected to occur along the zone in the future and their effects could be severe.
Google map showing geographic bounding box with values North bound -2.63 East bound 147.12 West bound 137.94 South bound -9.81
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Product Type/Sub Type

nonGeographicDataset

Constraints

Creative Commons Attribution 4.0 International Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

1983-01-01T00:00:00

Product Type

nonGeographicDataset

Topic Category

geoscientificInformation

GA Catalogue Number

81143 Product http://www.ga.gov.au/metadata-gateway/metadata/record/81143/

Keywords

GA Publication
Journal
PNG
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-2.63
East bound
147.12
West bound
137.94
South bound
-9.81

Digital Transfer Options

onLine

Distributor

Role
distributor
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

fae9173a-7054-71e4-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Commonwealth of Australia (Geoscience Australia)
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
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