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    The Mw7.8 2016 Kaikōura earthquake: Surface fault rupture and seismic hazard context

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    Date
    2017-06-30
    Authors
    Stirling, Mark W.
    Litchfield, N. J.
    Villamor, Pilar
    Van Dissen, Russ J.
    Nicol, Andy
    Pettinga, Jarg
    Barnes, Philip
    Langridge, Robert M.
    Little, Tim
    Barrell, David
    Mountjoy, Joshu
    Ries, W. F.
    Rowland, Julie V.
    Fenton, C.
    Hamling, Ian
    Asher, C.
    Barrier, Andrea
    Benson, Adrian
    Bischoff, Alan
    Borella, Josh
    Carne, R.
    Cochran, Ursula
    Cockcroft, Matt
    Cox, Simon
    Duke, Grace
    Fenton, F.
    Gasston, C.
    Grimshaw, Chris
    Hale, D.
    Hall, Brendan S.
    Hao, Ken X.
    Hatem, Alex
    Hemphill-Haley, Mark
    Heron, David
    Howarth, J.
    Juniper, Z.
    Kane, Tim
    Kearse, J.
    Khajavi, Narges
    Lamarche, Geoffroy
    Lawson, S.
    Lukovic, Biljana
    Madugo, C.
    Manousakis, I.
    McColl, Sam
    Noble, D.
    Pedley, Kate
    Sauer, K.
    Stahl, T.
    Strong, Delia
    Townsend, Dougal
    Toy, Virginia
    Villeneuve, Marlene
    Wandres, A.
    Williams, J.
    Woelz, Susanne
    Zinke, Robert
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    Abstract
    We provide a summary of the surface fault ruptures produced by the Mw7.8 14 November 2016 Kaikōura earthquake, including examples of damage to engineered structures, transportation networks and farming infrastructure produced by direct fault surface rupture displacement. We also provide an overview of the earthquake in the context of the earthquake source model and estimated ground motions from the current (2010) version of the National Seismic Hazard Model (NSHM) for New Zealand. A total of 21 faults ruptured along a c.180 km long zone during the earthquake, including some that were unknown prior to the event. The 2010 version of the NSHM had considered multi-fault ruptures in the Kaikōura area, but not to the degree observed in the earthquake. The number of faults involved a combination of known and unknown faults, a mix of complete and partial ruptures of the known faults, and the non-involvement of a major fault within the rupture zone (i.e. the Hope Fault) makes this rupture an unusually complex event by world standards. However, the strong ground motions of the earthquake are consistent with the high hazard of the Kaikōura area shown in maps produced from the NSHM.
    URI
    https://doi.org/10.5459/bnzsee.50.2.73-84
    Published in
    • Bulletin of the New Zealand Society for Earthquake Engineering

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