Preliminary geometry and kinematics of multiple surface ruptures during the 2016 MW 7.8 Kaikōura earthquake, North Canterbury region, New Zealand

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dc.contributor.authorKhajavi N
dc.contributor.authorNicol A
dc.contributor.authorFenton C
dc.contributor.authorPettinga J
dc.contributor.authorStahl T
dc.contributor.authorHyland N
dc.contributor.authorBushell T
dc.contributor.authorPedley KL
dc.contributor.authorMcColl S
dc.contributor.authorNoble D
dc.date.accessioned2018-05-27T21:48:26Z
dc.date.available2018-05-27T21:48:26Z
dc.date.issued2017en
dc.date.updated2017-10-18T22:58:49Z
dc.description.abstractThe Mw 7.8 Kaikōura earthquake ruptured ~200 km at the ground surface across the New Zealand plate boundary zone in the northern South Island. This study was conducted in an area of ~600 km2 in the epicentral region where the faults comprise two main non-coplanar sets that strike E-NE and NNE-NW with mainly steep dips (60о-80°). Analysis of the surface rupture using field and LiDAR data provides new information on the dimensions, geometries and kinematics of these faults which was not previously available from pre-earthquake active faults or bedrock structure. The more northerly striking fault set are sub-parallel to basement bedding and accommodated predominantly left-lateral reverse slip with net slips of ~1 and ~5 m for the Stone Jug and Leader faults, respectively. The E-NE striking Conway-Charwell and The Humps faults accrued right-lateral to oblique reverse with net slips of ~2 and ~3 m, respectively. The faults form a hard-linked system dominated by kinematics consistent with the ~260° trend of the relative plate motion vector and the transpressional structures recorded across the plate boundary in the NE South Island. Interaction and intersection of the main fault sets facilitated propagation of the earthquake and transfer of slip northwards across the plate boundary zone.en
dc.identifier.citationKhajavi N, Nicol A, Fenton C, Pettinga J, Stahl T, Hyland N, Bushell T, Pedley KL, McColl S, Noble D (2017). Preliminary geometry and kinematics of multiple surface ruptures during the 2016 MW 7.8 Kaikōura earthquake, North Canterbury region, New Zealand. Blenheim, New Zealand: 8th International INQUA Meeting on Paleoseismology, Active Tectonics and Archeoseismology (PATA). 13/11/2017-16/11/2017.en
dc.identifier.urihttp://hdl.handle.net/10092/15437
dc.language.isoen
dc.subjectKaikōura earthquakeen
dc.subjectsurface ruptureen
dc.subjectNorth Canterburyen
dc.subjectNew Zealanden
dc.subject.anzsrcField of Research::04 - Earth Sciences::0403 - Geology::040313 - Tectonicsen
dc.titlePreliminary geometry and kinematics of multiple surface ruptures during the 2016 MW 7.8 Kaikōura earthquake, North Canterbury region, New Zealanden
dc.typeConference Contributions - Publisheden
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