scholarly journals Illuminating the plate interface structure beneath Cook Strait, New Zealand, with receiver functions

2007 ◽  
Vol 112 (B6) ◽  
Author(s):  
Oliver S. Boyd ◽  
Martha K. Savage ◽  
Anne F. Sheehan ◽  
Craig H. Jones
Keyword(s):  
New Zealand ◽  
Receiver Functions ◽  
Interface Structure ◽  
Plate Interface ◽  
Cook Strait

scholarly journals Seismic Constraint on Heterogeneous Deformation and Stress State in the Forearc of the Hikurangi Subduction Zone, New Zealand

2021 ◽  
Vol 1 (3) ◽  
pp. 145-153
Author(s):  
Jeremy M. Gosselin ◽  
Pascal Audet ◽  
Bill Fry ◽  
Emily Warren-Smith
Keyword(s):  
New Zealand ◽  
Stress State ◽  
Subduction Zone ◽  
Receiver Functions ◽  
Scattering Data ◽  
Eastern Coast ◽  
Plate Interface ◽  
Tectonic Plates ◽  
Megathrust Earthquakes ◽  
The North

Abstract The Hikurangi subduction zone (HSZ) is the collisional boundary between the Pacific and Australian tectonic plates along the eastern coast of the North Island of New Zealand. The region is believed to be capable of hosting large megathrust earthquakes and associated tsunamis. Recent studies observe a range of slip behavior along the plate interface, with a sharp contrast between locked and creeping parts of the megathrust along the margin. This work uses teleseismic scattering data (receiver functions [RFs]) recorded at 53 long-running seismograph stations on the North Island of New Zealand to constrain the structure and mechanical properties of the forearc in the HSZ. We observe directional variations in RF phases at P–S converted delay times (i.e., depths) associated with the overlying forearc crust and note a general correlation with spatial variations in plate coupling as well as other geophysical properties. Our results suggest differences in the nature of crustal deformation (and stress state) along the Hikurangi margin, with evidence of clockwise rotation and/or extension in the northern HSZ, where the overriding forearc crust is uncoupled from the subducting Pacific slab.

A Red Water Bloom of Rotifers in Cook Strait, New Zealand

Nature ◽  
1960 ◽  
Vol 186 (4721) ◽  
pp. 328-329 ◽  
Author(s):  
VIVIENNE CASSIE
Keyword(s):  
New Zealand ◽  
Water Bloom ◽  
Cook Strait

Procellariiformes in Cook Strait, New Zealand

1969 ◽  
Vol 69 (3) ◽  
pp. 155-160 ◽  
Author(s):  
H. L. Secker
Keyword(s):  
New Zealand ◽  
Cook Strait

Factors controlling summer phytoplankton production in greater Cook Strait, New Zealand

1986 ◽  
Vol 20 (2) ◽  
pp. 253-279 ◽  
Author(s):  
J. M. Bradford ◽  
P. P. Lapennas ◽  
R. A. Murtagh ◽  
F. H. Chang ◽  
V. Wilkinson
Keyword(s):  
New Zealand ◽  
Phytoplankton Production ◽  
Cook Strait

The 1904 Ms6.8 Mw7.0-7.2 Cape Turnagain, New Zealand, earthquake

2006 ◽  
Vol 39 (4) ◽  
pp. 183-207
Author(s):  
G. L. Downes
Keyword(s):  
New Zealand ◽  
Surface Wave ◽  
Seismic Hazard ◽  
Goodness Of Fit ◽  
Central Business District ◽  
Maximum Magnitude ◽  
Surface Wave Magnitude ◽  
Plate Interface ◽  
Attenuation Relations ◽  
Instrumental Records

The 1904 August 09 NZT (August 08 UT) MS6.8 earthquake caused widespread structural and chimney damage from Napier to Wellington and was felt over a large part of New Zealand. Other than a brief paper in 1905, and determinations of its surface wave magnitude in the last 20 years, little has been done to better locate the earthquake or detail its effects. Comprehensive data have now been obtained from searches of historical documents, including newspapers, private and government papers, as well as instrumental records. Interpretation of the intensity data shows that the earthquake was probably centred near Cape Turnagain at relatively shallow depth. The paucity of aftershocks suggests that the earthquake occurred either on the subduction interface, or in the lower seismicity band or upper mantle of the subducting Pacific Plate. The area encompassed by the higher intensity isoseismals suggests the earthquake had a magnitude greater than the calculated surface wave magnitude MS6.75 ± 0.14 — possibly as high as MW7.2. At this magnitude, the earthquake becomes a more significant event in New Zealand’s historical record, and certainly the largest earthquake suspected of rupturing the plate interface along the Hikurangi Margin. A notable feature of the earthquake is the chimney and parapet damage caused in parts of Wellington Central Business District, approximately 170 km from the epicentre. Much of the city and inner suburbs experienced MM5-6, while MM6-7 occurred in several areas, mostly in those areas that are recognised as possibly susceptible to shaking enhancement, but also in several locations outside these areas. The 1904 Cape Turnagain earthquake has several implications for seismic hazard dependent on whether it was intra-slab or on the plate interface. Of particular importance, are the questions whether the damage in Wellington is exceptional and could represent microzone, focussing or directivity effects; the goodness of fit of the intensity distribution to modelled isoseismals using published attenuation relations; the compatibility of the magnitude with the maximum magnitude/magnitude cut-offs used in this area in the New Zealand Probabilistic Seismic Hazard model; and finally, the possibility that the 1904 earthquake might characterise plate interface earthquakes in southern Hawke’s Bay.

M2tidal effects in greater Cook Strait, New Zealand

1980 ◽  
Vol 85 (C5) ◽  
pp. 2728 ◽  
Author(s):  
Malcolm J. Bowman ◽  
Alick C. Kibblewhite ◽  
David E. Ash
Keyword(s):  
New Zealand ◽  
Cook Strait
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