Geometry and scale of fault segmentation and deformational bulging along an active oblique-slip fault (Wairarapa fault, New Zealand)

Carne, R.; Little, Timothy A.

doi:10.1130/b30535.1

Cited by 19 publications

(3 citation statements)

References 39 publications

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“…The WP fault indeed initiated less than 1-3 Myrs ago 6,48 and accommodated no more than 10 km of total lateral displacement 49 , which makes it an immature fault 46 . This is consistent with its fairly symmetric slip distribution 38,46 , and its highly segmented trace 25,33 . Immature faults have been shown to produce Fig.…”

Section: Discussionsupporting

confidence: 79%

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Repeated giant earthquakes on the Wairarapa fault, New Zealand, revealed by Lidar-based paleoseismology

Manighetti

Perrin

Dominguez

et al. 2020

Sci Rep

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The Mw 7.8 2016 Kaikoura earthquake ruptured the Kekerengu-Needle fault resulting in the loading of its eastern continuation, the Wairarapa fault. Since the most recent earthquake on Wairarapa occurred in 1855 and is one of the strongest continental earthquakes ever observed, it is critical to assess the seismic potential of the Wairarapa fault, which might be prone to break. Using Lidar data, we examine its bare-earth morphology and reveal ~650 mostly undiscovered offset geomorphic markers. Using a code we developed in earlier work, we automatically measure the lateral and vertical offsets of these markers providing more than 7000 well constrained measurements. The data document the lateral and vertical slip profiles of the 1855 earthquake for the first time and show its total slip reached ~20 m at surface. Modeling the entire offset dataset reveals 7 prior earthquakes ruptured the entire fault, each similarly producing 16.9 ± 1.4 m dextral slip and ~0.6 m vertical slip at surface in the same central bend zone of the fault. Thus, the Wairarapa fault repeatedly produced giant earthquakes and is likely able to produce a similarly strong forthcoming event. The extreme large size of the Wairarapa earthquakes questions our understanding of earthquake physics.

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Section: Discussionsupporting

confidence: 79%

“…1). More precisely, the fault is segmented into left-stepping segments of various lengths consistent with its dextral motion 33 ( Supplementary Fig. 1).…”

Section: Resultsmentioning

confidence: 99%

Repeated giant earthquakes on the Wairarapa fault, New Zealand, revealed by Lidar-based paleoseismology

Manighetti

Perrin

Dominguez

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…The fault array geometry suggests a component of dextral movement. Theoretical fault family for dextral strike‐slip is shown for comparison in (f), modified after Carne & Little, 2012. Structures are colour coded in both (e) and (f) as follows: grey—main (Lossiemouth) fault; dark red—synthetic Riedels (R); yellow—antithetic Riedels (R’); blue—tensile (T) or normal (N) faults; bright red—Y fractures; green—P fractures…”

Section: Resultsmentioning

confidence: 99%

Correlating deformation events onshore and offshore in superimposed rift basins: The Lossiemouth Fault Zone, Inner Moray Firth Basin, Scotland

et al. 2022

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Morphostructural analysis and Cenozoic evolution of Elephant Island, Southern Scotia Arc, Antarctica

Mink

Maestro

López-Martı́nez

et al. 2014

Int J Earth Sci (Geol Rundsch)

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Geometry and scale of fault segmentation and deformational bulging along an active oblique-slip fault (Wairarapa fault, New Zealand)

Cited by 19 publications

References 39 publications

Repeated giant earthquakes on the Wairarapa fault, New Zealand, revealed by Lidar-based paleoseismology

Repeated giant earthquakes on the Wairarapa fault, New Zealand, revealed by Lidar-based paleoseismology

Correlating deformation events onshore and offshore in superimposed rift basins: The Lossiemouth Fault Zone, Inner Moray Firth Basin, Scotland

Morphostructural analysis and Cenozoic evolution of Elephant Island, Southern Scotia Arc, Antarctica

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