Incipient subduction of the Ontong Java Plateau along the North Solomon trench

Taira, Asahiko; Mann, Paul; Rahardiawan, Riza

doi:10.1016/j.tecto.2004.07.052

Cited by 41 publications

(31 citation statements)

References 14 publications

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“…The Solomon Islands lie within one of the most active seismogenic zones globally due to the rapid and complicated convergence of the Pacific Plate with the Australian Plate and numerous microplates at approximately 10 cm yr −1 (Miura et al 2004;Phinney et al 2004;Taira et al 2004;Fig. 1a).…”

Section: Introductionmentioning

confidence: 99%

The energetic 2010 MW 7.1 Solomon Islands tsunami earthquake

Newman¹,

Feng²,

Fritz

et al. 2011

Geophysical Journal International

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SUMMARY On 2010 January 3 a moment magnitude MW 7.1 earthquake struck the Solomon Islands very near the San Cristobal trench, causing extensive landslides and surprisingly large tsunami waves. Because of the unique proximity of islands to the trench (<20 km) and earthquake, a post‐seismic survey successfully identified unexpected widespread coseismic subsidence towards the trench (up to 80 cm), with no discernable post‐seismic deformation. Approximately 1000 km from the earthquake ocean‐bottom pressure sensors measured 1–2 cm open‐ocean tsunami waves. Though spatially limited, the local tsunami wave heights up to 7 m were comparable to the much larger adjacent 2007 MW 8.1 earthquake. The seismically determined focal mechanism, broad‐scale subsidence, tsunami amplitude and open ocean wave heights are all explained by an extremely shallow low‐angle thrust adjacent to the impinging subduction of the two seamounts near the trench. This event belongs to a potentially new class of shallow ‘tsunami earthquakes’ that is not identified as deficient in radiated seismic energy.

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Section: Introductionmentioning

confidence: 99%

The energetic 2010 MW 7.1 Solomon Islands tsunami earthquake

Newman¹,

Feng²,

Fritz

et al. 2011

Geophysical Journal International

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“…The Solomon Islands are located in an active plate boundary, where the AUP and associated microplates (i.e., Woodlark Plate (WLP) and Solomon Sea Plate (SSP)) are underthrusting beneath the PAP (Figure a) [ Demets et al ., ; ; Beavan et al ., ; Miura et al ., ; Phinney et al ., ; Taira et al ., ; Taylor et al ., , ; Argus et al ., ; Newman et al ., ]. Along the southeastern Solomon Islands, the AUP is subducting obliquely beneath the Solomon Arc, having generated the San Cristobal Trench (Figure b).…”

Section: Tectonic Settingmentioning

confidence: 99%

Characteristics on fault coupling along the Solomon megathrust based on GPS observations from 2011 to 2014

Kuo

Chen

et al. 2016

Geophysical Research Letters

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The Solomon megathrust along the western Solomon arc generated two megathrust earthquakes in the past decade (Mw 8.1 in 2007 and Mw 7.1 in 2010). To investigate the interseismic deformation and inferred coupling on the megathrust, we deployed the first continuous GPS network in the Western Solomon Islands. Our 2011–2014 GPS data and the back slip inversion model show coupling ratio as high as 73% along the southeastern 2007 rupture segment but only 10% on average along the segment of 2010 event. Based on the spatial distribution of coseismic slip, aftershock clusters, derived coupling pattern, and paleogeodetic records, we discovered the former as a semipermanent asperity and the latter as a potential megathrust barrier. We propose that a characteristic earthquake of magnitude not less than Mw 8 will recur in an interval of 100 or more years by either single or doublet earthquake.

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“…Geophysical evidence argues that the Ontong-Java Plateau collision with New Guinea (Fig. 14.1) is resulting in a propagating incipient subduction zone along the North Solomon Trench (Taira et al, 2004). Furthermore, Stern (2004) suggests that there is as yet unrealized potential for collision-related subduction inception in the Indian Ocean associated with the Himalayan suture.…”

Section: Modern Examplesmentioning

confidence: 99%

Sedimentation at Plate Boundaries in Transition

Marsaglia

2011

Tectonics of Sedimentary Basins

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From inception to termination convergent margins are dynamic regions. Subduction initiation is poorly understood with arguments for both induced and spontaneous processes. Geodynamic models help to predict the sedimentary-volcanic records of such events, but there are few areas where these models have been tested, particularly pre-Cenozoic examples. Where subduction is induced, the sedimentary signatures should include evidence for rapid uplift (unconformity), then rapid subsidence (finingand deepening-upward succession), followed by building of the arc edifice. Where subduction is spontaneous, the proto-forearc experiences subsidence and early magmatism prior to development of the magmatic arc. Once initiated, there are other opportunities for tectonic overprinting of the forearc owing to the formation and migration of plate triple junctions. There are several well-studied modern to Cenozoic examples that suggest differing signatures depending on the plate configuration. In the case of a triple junction involving purely subduction (trench-trench-trench) the overriding signature is associated with arc terrane accretion, whereas the interaction of a spreading ridge at a trench-ridge-trench triple junction can result in anomalous neartrench magmatism, thermal overprinting of the forearc, and subduction erosion. In triple-junction cases where subduction is superceded by transform plate motion (e.g., trench-fault-fault) the transition is marked by progressive uplift and deformation of the forearc concomitant with cessation of arc magmatism. The demise of a convergent margin can be through simple abandonment and subsidence, or transition to a transform plate margin, or where a spreading ridge is involved, result in deformation, uplift, and thermal/volcanic overprinting of the forearc prior to abandonment.

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Incipient subduction of the Ontong Java Plateau along the North Solomon trench

Cited by 41 publications

References 14 publications

The energetic 2010 MW 7.1 Solomon Islands tsunami earthquake

The energetic 2010 MW 7.1 Solomon Islands tsunami earthquake

Characteristics on fault coupling along the Solomon megathrust based on GPS observations from 2011 to 2014

Sedimentation at Plate Boundaries in Transition

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