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The zone includes most of the islands of Vanuatu, the Santa Cruz islands of the southern Solomon Islands, [4] and the Loyalty Islands.A number of ocean floor features are related to the zone, in particular the New Hebrides Trench (South New Hebridies Trench) [5] and the North New Hebrides Trench (Torres Trench) which is separated from the southern trench by the d'Entrecasteaux Ridge and the ...
The southern New Hebrides Trench is defined as extending from to The North New Hebrides Trench (Torres Trench) that extends to the west of the Solomon Islands is a separate marine feature to the southern New Hebrides Trench due to the d'Entrecasteaux Ridge, even though they are tectonically part of the same subduction zone.
"Potential tsunami hazard of the southern Vanuatu subduction zone: tectonics, case study of the Matthew Island tsunami of 10 February 2021 and implication in regional hazard assessment". Natural Hazards and Earth System Sciences. 23 (2): 393–414. Bibcode:2023NHESS..23..393R. doi: 10.5194/nhess-23-393-2023. S2CID 253207848.
The d'Entrecasteaux (French pronunciation: [dɑ̃tʁəkasto]) Ridge (DER) is a double oceanic ridge in the south-west Pacific Ocean, north of New Caledonia and west of Vanuatu Islands. It forms the northern extension of the New Caledonia– Loyalty Islands arc , and is now actively subducting in the Vanuatu subduction zone under the Vanuatu/New ...
"USGS:M 4.8 - southeast of the Loyalty Islands:regional information" Collot, JY; Fisher, MA (1991). "The collision zone between the North d'Entrecasteaux Ridge and the New Hebrides island arc: 1. Sea Beam morphology and shallow structure" (PDF). Journal of Geophysical Research: Solid Earth. 96 (B3): 4457–78.
This subduction zone is one of the most active plate boundaries globally, moving at a rate of approximately 170 mm (7 in) per year. [5] While much of the island arc experiences intermediate-depth earthquakes along a Wadati–Benioff zone that dips steeply at 70°, the area adjacent to the D'entrecasteaux Ridge does not. There is a corresponding ...
Volcanic activity is also present along this north-northwest trending and northeast-dipping subduction zone. [2] While much of the island arc experiences intermediate-depth earthquakes along a Wadati–Benioff zone that dips steeply at 70°, the area adjacent to the d'Entrecasteaux Ridge does not. There is a corresponding gap in seismicity that ...
The ridge contains Matthew Island and Hunter Island and extends from southern Vanuatu near the Volsmar seamount via the region of Ceva-i-Ra (Conway Reef) towards Fiji. [4] Its length on this definition is about 550 km (340 mi) but earlier work included other parts of the Hunter fracture zone that are now known to be discontinuous topographically and on such historic definitions the length ...