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Tectonic interpretation of aftershock relocations in eastern Papua New Guinea using teleseismic data and the arrival pattern method

Tregoning, Paul; Sambridge, Malcolm; McQueen, Herbert; Toulmin, S; Nicholson, T

Description

The arrival pattern (AP) method and teleseismic data have been used to relocate aftershocks following three major (Mw > = 7.8) interplate earthquakes that occurred in eastern Papua New Guinea in 2000 November. The first event was an Mw = 8.0 strike-slip earthquake that ruptured the Weitin fault over a length of ∼100 km. No aftershocks were located in the upper 15 km, suggesting that the accumulated strain was fully released in this event. The two subsequent Mw = 7.8 thrust events occurred on...[Show more]

dc.contributor.authorTregoning, Paul
dc.contributor.authorSambridge, Malcolm
dc.contributor.authorMcQueen, Herbert
dc.contributor.authorToulmin, S
dc.contributor.authorNicholson, T
dc.date.accessioned2015-12-13T22:59:34Z
dc.identifier.issn0956-540X
dc.identifier.urihttp://hdl.handle.net/1885/83869
dc.description.abstractThe arrival pattern (AP) method and teleseismic data have been used to relocate aftershocks following three major (Mw > = 7.8) interplate earthquakes that occurred in eastern Papua New Guinea in 2000 November. The first event was an Mw = 8.0 strike-slip earthquake that ruptured the Weitin fault over a length of ∼100 km. No aftershocks were located in the upper 15 km, suggesting that the accumulated strain was fully released in this event. The two subsequent Mw = 7.8 thrust events occurred on the New Britain trench. Wadati-Benioff zones dipping ∼20° define the locations of the thrust events at 152°E and 153°E on fault planes with strikes of 75° and 65°, respectively. The plot of aftershocks defines a complex seismic zone beneath New Ireland where events have occurred in the overriding Pacific and South Bismarck plates above the deeper zone of subduction of the Solomon Sea Plate. These events cluster in a broad zone to the northeast of the Weitin fault rather than defining a linear feature that might have been expected following a near-vertical major strike-slip event.
dc.publisherBlackwell Publishing Ltd
dc.sourceGeophysical Journal International
dc.subjectKeywords: aftershock; arrival time; crustal structure; strike-slip fault; teleseismic wave; Melanesia; oceanic regions; Pacific islands; Pacific Ocean; Papua New Guinea; World Aftershocks; Arrival pattern method; Papua New Guinea; Seismology; Weitin fault
dc.titleTectonic interpretation of aftershock relocations in eastern Papua New Guinea using teleseismic data and the arrival pattern method
dc.typeJournal article
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.citationvolume160
dc.date.issued2005
local.identifier.absfor040407 - Seismology and Seismic Exploration
local.identifier.absfor040403 - Geophysical Fluid Dynamics
local.identifier.ariespublicationMigratedxPub12146
local.type.statusPublished Version
local.contributor.affiliationTregoning, Paul, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationSambridge, Malcolm, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationMcQueen, Herbert, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationToulmin, S, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationNicholson, T, College of Physical and Mathematical Sciences, ANU
local.description.embargo2037-12-31
local.bibliographicCitation.startpage1103
local.bibliographicCitation.lastpage1111
local.identifier.doi10.1111/j.1365-246X.2005.02567.x
dc.date.updated2015-12-12T07:29:24Z
local.identifier.scopusID2-s2.0-15944403567
CollectionsANU Research Publications

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