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Coseismic Rupture and Preliminary Slip Estimates for the Papatea Fault and Its Role in the 2016 Mw 7.8 Kaikōura, New Zealand, Earthquake

2018; Seismological Society of America; Volume: 108; Issue: 3B Linguagem: Inglês

10.1785/0120170336

1943-3573

Robert Langridge, J. V. Rowland, Pilar Villamor, Joshu J. Mountjoy, Dougal Townsend, Edwin Nissen, Christopher Madugo, W. Ries, Caleb Gasston, Albane Canva, Alexandra E. Hatem, Ian Hamling,

Seismology and Earthquake Studies

Research Article| June 12, 2018 Coseismic Rupture and Preliminary Slip Estimates for the Papatea Fault and Its Role in the 2016 Mw 7.8 Kaikōura, New Zealand, Earthquake Robert M. Langridge; Robert M. Langridge aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Search for other works by this author on: GSW Google Scholar Julie Rowland; Julie Rowland bThe University of Auckland, Private Bag 92019, Auckland 1142, New Zealand Search for other works by this author on: GSW Google Scholar Pilar Villamor; Pilar Villamor aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Search for other works by this author on: GSW Google Scholar Joshu Mountjoy; Joshu Mountjoy cNational Institute of Water and Atmospheric Research, 301 Evans Bay Parade, Wellington 6021, New Zealand Search for other works by this author on: GSW Google Scholar Dougal B. Townsend; Dougal B. Townsend aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Search for other works by this author on: GSW Google Scholar Edwin Nissen; Edwin Nissen dSchool of Earth and Ocean Sciences, Bob Wright Centre A405, University of Victoria, Victoria, British Colombia, Canada V8P 5C2 Search for other works by this author on: GSW Google Scholar Christopher Madugo; Christopher Madugo ePacific Gas and Electric Company, P.O. Box 997300, Sacramento, California 95899‐7300 Search for other works by this author on: GSW Google Scholar William F. Ries; William F. Ries aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Search for other works by this author on: GSW Google Scholar Caleb Gasston; Caleb Gasston bThe University of Auckland, Private Bag 92019, Auckland 1142, New Zealand Search for other works by this author on: GSW Google Scholar Albane Canva; Albane Canva bThe University of Auckland, Private Bag 92019, Auckland 1142, New Zealand Search for other works by this author on: GSW Google Scholar Alexandra E. Hatem; Alexandra E. Hatem fUniversity of Southern California, 3651 Trousdale Parkway, Los Angeles, California 90089 Search for other works by this author on: GSW Google Scholar Ian Hamling Ian Hamling aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Search for other works by this author on: GSW Google Scholar Author and Article Information Robert M. Langridge aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Julie Rowland bThe University of Auckland, Private Bag 92019, Auckland 1142, New Zealand Pilar Villamor aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Joshu Mountjoy cNational Institute of Water and Atmospheric Research, 301 Evans Bay Parade, Wellington 6021, New Zealand Dougal B. Townsend aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Edwin Nissen dSchool of Earth and Ocean Sciences, Bob Wright Centre A405, University of Victoria, Victoria, British Colombia, Canada V8P 5C2 Christopher Madugo ePacific Gas and Electric Company, P.O. Box 997300, Sacramento, California 95899‐7300 William F. Ries aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Caleb Gasston bThe University of Auckland, Private Bag 92019, Auckland 1142, New Zealand Albane Canva bThe University of Auckland, Private Bag 92019, Auckland 1142, New Zealand Alexandra E. Hatem fUniversity of Southern California, 3651 Trousdale Parkway, Los Angeles, California 90089 Ian Hamling aGNS Science, P.O. Box 30‐368, Lower Hutt 5040, New Zealand, R.Langridge@gns.cri.nz Publisher: Seismological Society of America First Online: 12 Jun 2018 Online Issn: 1943-3573 Print Issn: 0037-1106 © Seismological Society of America Bulletin of the Seismological Society of America (2018) 108 (3B): 1596–1622. https://doi.org/10.1785/0120170336 Article history First Online: 12 Jun 2018 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Robert M. Langridge, Julie Rowland, Pilar Villamor, Joshu Mountjoy, Dougal B. Townsend, Edwin Nissen, Christopher Madugo, William F. Ries, Caleb Gasston, Albane Canva, Alexandra E. Hatem, Ian Hamling; Coseismic Rupture and Preliminary Slip Estimates for the Papatea Fault and Its Role in the 2016 Mw 7.8 Kaikōura, New Zealand, Earthquake. Bulletin of the Seismological Society of America 2018;; 108 (3B): 1596–1622. doi: https://doi.org/10.1785/0120170336 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract Coseismic rupture of the 19‐km‐long north‐striking and west‐dipping sinistral reverse Papatea fault and nearby structures and uplift/translation of the Papatea block are two of the exceptional components of the 14 November 2016 Mw 7.8 Kaikōura earthquake. The dual‐stranded Papatea fault, comprising main (sinistral reverse) and western (dip‐slip) strands, ruptured onshore and offshore from south of Waipapa Bay to George Stream in the north, bounding the eastern side of the Papatea block. Fault rupture mapping was aided by the acquisition of multibeam bathymetry, light detection and ranging (lidar) topography and other imagery, as well as differential lidar (D‐lidar) from along the coast and Clarence River valley. On land, vertical throw and sinistral offset on the Papatea fault was assessed across an aperture of ±100 m using uncorrected D‐lidar and field data to develop preliminary slip distributions. The maximum up‐to‐the‐west throw on the main strand is ∼9.5±0.5 m⁠, and the mean throw across the Papatea fault is ∼4.5±0.3 m⁠. The maximum sinistral offset, measured near the coast on the main strand, is ∼6.1±0.5 m⁠. From these data, and considering fault dip, we calculate a maximum net slip of 11.5±2 m and an average net slip of 6.4±0.2 m for the Papatea fault surface rupture in 2016. Large sinistral reverse displacement on the Papatea fault is consistent with uplift and southward escape of the Papatea block as observed from Interferometric Synthetic Aperture Radar (InSAR) and optical image correlation datasets. The throw and net slip are exceedingly high for the length of the Papatea fault; such large movements likely only occur during multifault Kaikōura‐type earthquakes that conceivably have recurrence times of ≥5000–12,000 yrs⁠. The role of the Papatea fault in the Kaikōura earthquake has significant implications for characterizing complex fault sources in seismic hazard models. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.