Surface rupture during the 2010 Mw 7.1 Darfield (Canterbury) earthquake: Implications for fault rupture dynamics and seismic-hazard analysis

Abstract

Research Article| January 01, 2012 Surface rupture during the 2010 Mw 7.1 Darfield (Canterbury) earthquake: Implications for fault rupture dynamics and seismic-hazard analysis M. Quigley; M. Quigley 1Department of Geological Sciences, University of Canterbury, 8140 Christchurch, New Zealand Search for other works by this author on: GSW Google Scholar R. Van Dissen; R. Van Dissen 2GNS Science, Lower Hutt 5040, New Zealand Search for other works by this author on: GSW Google Scholar N. Litchfield; N. Litchfield 2GNS Science, Lower Hutt 5040, New Zealand Search for other works by this author on: GSW Google Scholar P. Villamor; P. Villamor 2GNS Science, Lower Hutt 5040, New Zealand Search for other works by this author on: GSW Google Scholar B. Duffy; B. Duffy 1Department of Geological Sciences, University of Canterbury, 8140 Christchurch, New Zealand Search for other works by this author on: GSW Google Scholar D. Barrell; D. Barrell 3GNS Science, Dunedin 9016, New Zealand Search for other works by this author on: GSW Google Scholar K. Furlong; K. Furlong 4Department of Geosciences, Pennsylvania State University, University Park, Pennsylvania 16802, USA Search for other works by this author on: GSW Google Scholar T. Stahl; T. Stahl 1Department of Geological Sciences, University of Canterbury, 8140 Christchurch, New Zealand Search for other works by this author on: GSW Google Scholar E. Bilderback; E. Bilderback 1Department of Geological Sciences, University of Canterbury, 8140 Christchurch, New Zealand Search for other works by this author on: GSW Google Scholar D. Noble D. Noble 1Department of Geological Sciences, University of Canterbury, 8140 Christchurch, New Zealand Search for other works by this author on: GSW Google Scholar Geology (2012) 40 (1): 55–58. https://doi.org/10.1130/G32528.1 Article history received: 03 Jun 2011 rev-recd: 06 Aug 2011 accepted: 24 Aug 2011 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation M. Quigley, R. Van Dissen, N. Litchfield, P. Villamor, B. Duffy, D. Barrell, K. Furlong, T. Stahl, E. Bilderback, D. Noble; Surface rupture during the 2010 Mw 7.1 Darfield (Canterbury) earthquake: Implications for fault rupture dynamics and seismic-hazard analysis. Geology 2012;; 40 (1): 55–58. doi: https://doi.org/10.1130/G32528.1 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 SocietyGeology Search Advanced Search Abstract The September 2010 Mw 7.1 Darfield (Canterbury) earthquake in New Zealand is one of the best-recorded earthquakes of this magnitude. The earthquake occurred on a previously unidentified fault system and generated a 29.5 ± 0.5-km-long surface rupture across a low-relief agricultural landscape. High-accuracy measurements of coseismic displacements were obtained at over 100 localities along the Greendale fault. Maximum net displacement (Dmax) (5.3 ± 0.5 m) and average net displacement (Davg) (2.5 ± 0.1 m) are anomalously large for an earthquake of this Mw. Dmax / surface rupture length (SRL) and Davg/SRL ratios are among the largest ever recorded for a continental strike-slip earthquake. “Geologically derived” estimates of moment magnitude (MwG) are less than the seismologically derived Mw, derived using widely employed SRL-Mw scaling regressions. MwG is greater than Mw using Dmax- and Davg-Mw regressions. The “geologically derived” static stress drop of 13.9 ± 3.7 MPa provides a context with which to compare this earthquake rupture to interplate and intraplate ruptures of similar Mw. This data set provides fundamental information on fault rupture processes relevant to seismic-hazard modeling in this region and analogous settings globally. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.