The 2010–2011 Canterbury Earthquake Sequence: Environmental effects, seismic triggering thresholds and geologic legacy

Abstract Seismic shaking and tectonic deformation during strong earthquakes can trigger widespread environmental effects. The severity and extent of a given effect relates to the characteristics of the causative earthquake and the intrinsic properties of the affected media. Documentation of earthquake environmental effects in well-instrumented, historical earthquakes can enable seismologic triggering thresholds to be estimated across a spectrum of geologic, topographic and hydrologic site conditions, and implemented into seismic hazard assessments, geotechnical engineering designs, palaeoseismic interpretations, and forecasts of the impacts of future earthquakes. The 2010–2011 Canterbury Earthquake Sequence (CES), including the moment magnitude (M w ) 7.1 Darfield earthquake and M w 6.2, 6.0, 5.9, and 5.8 aftershocks, occurred on a suite of previously unidentified, primarily blind, active faults in the eastern South Island of New Zealand. The CES is one of Earth's best recorded historical earthquake sequences. The location of the CES proximal to and beneath a major urban centre enabled rapid and detailed collection of vast amounts of field, geospatial, geotechnical, hydrologic, biologic, and seismologic data, and allowed incremental and cumulative environmental responses to seismic forcing to be documented throughout a protracted earthquake sequence. The CES caused multiple instances of tectonic surface deformation (≥ 3 events), surface manifestations of liquefaction (≥ 11 events), lateral spreading (≥ 6 events), rockfall (≥ 6 events), cliff collapse (≥ 3 events), subsidence (≥ 4 events), and hydrological (10s of events) and biological shifts (≥ 3 events). The terrestrial area affected by strong shaking (e.g. peak ground acceleration (PGA) ≥ 0.1–0.3 g), and the maximum distances between earthquake rupture and environmental response (R rup ), both generally increased with increased earthquake M w , but were also influenced by earthquake location and source characteristics. However, the severity of a given environmental response at any given site related predominantly to ground shaking characteristics (PGA, peak ground velocities) and site conditions (water table depth, soil type, geomorphic and topographic setting) rather than earthquake M w . In most cases, the most severe liquefaction, rockfall, cliff collapse, subsidence, flooding, tree damage, and biologic habitat changes were triggered by proximal, moderate magnitude (M w  ≤ 6.2) earthquakes on blind faults. CES environmental effects will be incompletely preserved in the geologic record and variably diagnostic of spatial and temporal earthquake clustering. Liquefaction feeder dikes in areas of severe and recurrent liquefaction will provide the best preserved and potentially most diagnostic CES features. Rockfall talus deposits and boulders will be well preserved and potentially diagnostic of the strong intensity of CES shaking, but challenging to decipher in terms of single versus multiple events. Most other phenomena will be transient (e.g., distal groundwater responses), not uniquely diagnostic of earthquakes (e.g., flooding), or more ambiguous (e.g. biologic changes). Preliminary palaeoseismic investigations in the CES region indicate recurrence of liquefaction in susceptible sediments of ~ 100 to 300 yr, recurrence of severe rockfall event(s) of ca. 6000 to 8000 yr, and recurrence of surface rupturing on the largest CES source fault of ca. 20,000 to 30,000 yr. These data highlight the importance of utilising multiple proxy datasets in palaeoearthquake studies. The severity of environmental effects triggered during the strongest CES earthquakes was as great as or equivalent to any historic or prehistoric effects recorded in the geologic record. We suggest that the shaking caused by rupture of local blind faults in the CES comprised a ‘worst case’ seismic shaking scenario for parts of the Christchurch urban area. Moderate M w blind fault earthquakes may contribute the highest proportion of seismic hazard, be the most important drivers of landscape evolution, and dominate the palaeoseismic record in some locations on Earth, including locations distal from any identified active faults. A high scientific priority should be placed on improving the spatial extent and quality of ‘off-fault’ shaking records of strong earthquakes, particularly near major urban centres.

[1]  Yong‐Gang Li,et al.  Fault damage zones of the M7.1 Darfield and M6.3 Christchurch earthquakes characterized by fault-zone trapped waves , 2014 .

[2]  Harry Fielding Reid,et al.  The California Earthquake of April 18, 1906: Report of the State Earthquake Investigation Commission ... , 2010 .

[3]  M. Berberian Master “blind” thrust faults hidden under the Zagros folds: active basement tectonics and surface morphotectonics , 1995 .

[4]  Bill Fry,et al.  Large Apparent Stresses from the Canterbury Earthquakes of 2010 and 2011 , 2011 .

[5]  C. Thurber,et al.  High‐resolution relocation of aftershocks of the Mw 7.1 Darfield, New Zealand, earthquake and implications for fault activity , 2013 .

[6]  Iris Möller,et al.  Wave Transformation Over Salt Marshes: A Field and Numerical Modelling Study from North Norfolk, England , 1999 .

[7]  Brendon A. Bradley,et al.  Systematic Ground Motion Observations in the Canterbury Earthquakes and Region-Specific Non-Ergodic Empirical Ground Motion Modeling , 2015 .

[8]  James Jackson,et al.  Slip in the 2010–2011 Canterbury earthquakes, New Zealand , 2012 .

[9]  J. D. Bray,et al.  Assessment of Liquefaction-Induced Land Damage for Residential Christchurch , 2014 .

[10]  B. Bradley,et al.  The sinking city: Earthquakes increase flood hazard in Christchurch, New Zealand , 2015 .

[11]  Gina Josephine Vettoretti Intertidal foraminifera of the Avon-Heathcote Estuary; response to coseismic deformation and potential to record local historic events , 2014 .

[12]  Eric J. Fielding,et al.  Fault Location and Slip Distribution of the 22 February 2011 Mw 6.2 Christchurch, New Zealand, Earthquake from Geodetic Data , 2011 .

[13]  Lionel Carter,et al.  Towards a climate event stratigraphy for New Zealand over the past 30 000 years (NZ‐INTIMATE project) , 2007 .

[14]  A. Jiménez,et al.  Stress triggering and the Canterbury earthquake sequence , 2014 .

[15]  Ken Gledhill,et al.  Evolution of the 2010–2012 Canterbury earthquake sequence , 2012 .

[16]  M. Quigley,et al.  Paleoliquefaction in Christchurch, New Zealand , 2015 .

[17]  Aileen Lawrie Shore platforms at +6–8 m above mean sea level on Banks Peninsula and implications for tectonic stability , 1993 .

[18]  M. Bebbington,et al.  Cumulative Coulomb Stress Triggering as an Explanation for the Canterbury (New Zealand) Aftershock Sequence: Initial Conditions Are Everything? , 2015, Pure and Applied Geophysics.

[19]  W. Bull,et al.  Lichen dating of earthquake-generated regional rockfall events, Southern Alps, New Zealand , 1998 .

[20]  M. McSaveney,et al.  GIS modelling in support of earthquake-induced rockfall and cliff collapse risk assessment in the Port Hills, Christchurch , 2014 .

[21]  J. Adams Paleoseismicity of the Alpine fault seismic gap, New Zealand , 1980 .

[22]  Brendon A. Bradley,et al.  Site-specific and spatially-distributed ground-motion intensity estimation in the 2010–2011 Canterbury earthquakes , 2014 .

[23]  R. Green,et al.  Assessment of various CPT based liquefaction severity index frameworks relative to the Ishihara (1985) H1–H2 boundary curves , 2015 .

[24]  Matthew C. Gerstenberger,et al.  SEISMIC HAZARD OF THE CANTERBURY REGION, NEW ZEALAND: NEW EARTHQUAKE SOURCE MODEL AND METHODOLOGY , 2008 .

[25]  S. Harris Infilled Fissures in Loess, Banks Peninsula, New Zealand , 1983 .

[26]  Sebastien Leprince,et al.  Fault kinematics and surface deformation across a releasing bend during the 2010 MW 7.1 Darfield, New Zealand, earthquake revealed by differential LiDAR and cadastral surveying , 2013 .

[27]  J. Clague,et al.  Environmental Seismic Intensity scale - ESI 2007 La scala di Intensità Sismica basata sugli effetti ambientali - ESI 2007 , 2007 .

[28]  B. Delvaux,et al.  Porosity and available water of temporarily waterlogged soils in a Quercus robur (L.) declining stand , 2005, Plant and Soil.

[29]  Brendon A. Bradley,et al.  A New Zealand‐Specific Pseudospectral Acceleration Ground‐Motion Prediction Equation for Active Shallow Crustal Earthquakes Based on Foreign Models , 2013 .

[30]  Caroline Holden,et al.  The Darfield (Canterbury, New Zealand) Mw 7.1 Earthquake of September 2010: A Preliminary Seismological Report , 2011 .

[31]  Brendon A. Bradley,et al.  Ground Motion and Seismic Source Aspects of the Canterbury Earthquake Sequence , 2014 .

[32]  Paolo Galli,et al.  New empirical relationships between magnitude and distance for liquefaction , 2000 .

[33]  J. Bind,et al.  Mapping earthquake induced topographical change and liquefaction in the Avon-Heathcote Estuary , 2011 .

[34]  R. Green,et al.  Development of magnitude-bound relations for paleoliquefaction analyses: New Zealand case study , 2015 .

[35]  K. Feigl,et al.  The displacement field of the Landers earthquake mapped by radar interferometry , 1993, Nature.

[36]  A. G. Brady,et al.  The Loma Prieta earthquake, ground motion, and damage in Oakland, Treasure Island, and San Francisco , 1991, Bulletin of the Seismological Society of America.

[37]  S. Levick,et al.  Map of the 2010 Greendale Fault surface rupture, Canterbury, New Zealand: application to land use planning , 2012 .

[38]  T. Little,et al.  Early Holocene paleoseismic history at the Pakarae locality, eastern North Island, New Zealand, inferred from transgressive marine sequence architecture , 2007 .

[39]  Sarah L. Gassman,et al.  Accounting for soil aging when assessing liquefaction potential , 2006 .

[40]  Brendon A. Bradley,et al.  Soil Liquefaction Effects in the Central Business District during the February 2011 Christchurch Earthquake , 2011 .

[41]  S. V. Ballegooy,et al.  Effect of Fines Content Correlations and Liquefaction Susceptibility Thresholds on Liquefaction Consequence , 2015 .

[42]  J. Morgenroth,et al.  Soil profile inversion in earthquake-induced liquefaction-affected soils and the potential effects on urban trees , 2014 .

[43]  W. Silva,et al.  CHARACTERISTICS OF VERTICAL STRONG GROUND MOTIONS FOR APPLICATIONS TO ENGINEERING DESIGN , 1997 .

[44]  C. Reid,et al.  Sand volcanoes in the Avon–Heathcote Estuary produced by the 2010–2011 Christchurch Earthquakes: implications for geological preservation and expression , 2012 .

[45]  T. Cochrane,et al.  Geotechnical & flooding reconnaissance of the 2014 March flood event post 2010-2011 Canterbury earthquake sequence, New Zealand. Report No. GEER035 , 2014 .

[46]  L. Ishihara,et al.  Stability of Natural Deposits during Earthquakes , 1985 .

[47]  Vladimir Graizer,et al.  Some Key Features of the Strong-Motion Data from the M 6.0 Parkfield, California, Earthquake of 28 September 2004 , 2006 .

[48]  S. Beck,et al.  The 2002 Denali Fault and 2001 Kunlun Fault Earthquakes: Complex Rupture Processes of Two Large Strike-Slip Events , 2004 .

[49]  R. Shcherbakov,et al.  Statistical analysis of the 2010 M W 7.1 Darfield Earthquake aftershock sequence , 2012 .

[50]  J. Lipps Micropaleontological evidence of large earthquakes in the past , 2006 .

[51]  D. Teagle,et al.  Changes in hot spring temperature and hydrogeology of the Alpine Fault hanging wall, New Zealand, induced by distal South Island earthquakes , 2014 .

[52]  R. Duncan,et al.  Prehistoric dates of the most recent Alpine fault earthquakes, New Zealand , 1999 .

[53]  SURFACE RUPTURE OF THE GREENDALE FAULT DURING THE DARFIELD (CANTERBURY) EARTHQUAKE, NEW ZEALAND: INITIAL FINDINGS , 2010 .

[54]  Thomas K. Rockwell,et al.  Paleoseismology of the Johnson Valley, Kickapoo, and Homestead Valley Faults: Clustering of Earthquakes in the Eastern California Shear Zone , 2000 .

[55]  R. Langridge,et al.  A model of active faulting in New Zealand , 2014 .

[56]  M. Quigley,et al.  Quaternary faults of south-central Australia: Palaeoseismicity, slip rates and origin , 2006 .

[57]  Kevin L. Bertram,et al.  Post-earthquake seismic reflection survey, Christchurch, New Zealand , 2012 .

[58]  R. Dissen,et al.  Earthquake Source Identification and Characterisation for the Canterbury Region, South Island, New Zealand , 2001 .

[59]  H. Cowan The North Canterbury earthquake of September 1, 1888 , 1991 .

[60]  Richard G. Gordon,et al.  Geologically current plate motions , 2010 .

[61]  Pilar Villamor,et al.  Surface rupture during the 2010 Mw 7.1 Darfield (Canterbury) earthquake: Implications for fault rupture dynamics and seismic-hazard analysis , 2012 .

[62]  M. Yetton The probability and consequences of the next alpine fault earthquake, South Island, New Zealand , 2000 .

[63]  K. Onder Cetin,et al.  Performance-Based Assessment of Magnitude (Duration) Scaling Factors , 2012 .

[64]  B. Hayward,et al.  Foraminiferal record of the 2010–2011 Canterbury earthquake sequence, New Zealand, and possible predecessors , 2015 .

[65]  M. Quigley,et al.  Tectonic geomorphology of Australia , 2010 .

[66]  T. Wilson,et al.  Liquefaction ejecta clean-up in Christchurch during the 2010-2011 earthquake sequence , 2012 .

[67]  B. R. Paterson,et al.  Geology of Christchurch, New Zealand , 1995 .

[68]  Steven G. Wesnousky,et al.  Displacement and Geometrical Characteristics of Earthquake Surface Ruptures: Issues and Implications for Seismic-Hazard Analysis and the Process of Earthquake Rupture , 2008 .

[69]  C. Davison III.—Report on the Great Earthquake of June 12th, 1897 . By R. D. Oldham, A.R.S.M., F.G.S., Superintendent, Geological Survey of India. Mem. Geol. Survey of India, vol. xxix. (Calcutta, 1899.) , 1900, Geological Magazine.

[70]  H. Gärtner,et al.  Effects of experimental stem burial on radial growth and wood anatomy of pedunculate oak , 2015 .

[71]  J. Beavan,et al.  Balancing the plate motion budget in the South Island, New Zealand using GPS, geological and seismological data , 2007 .

[72]  Matthew W. Hughes,et al.  Lateral spreading and its impacts in urban areas in the 2010–2011 Christchurch earthquakes , 2012 .

[73]  U. Cochran,et al.  Investigating subduction earthquake geology along the southern Hikurangi margin using palaeoenvironmental histories of intertidal inlets , 2011 .

[74]  B. F. Atwater,et al.  Evidence for Great Holocene Earthquakes Along the Outer Coast of Washington State , 1987, Science.

[75]  Misko Cubrinovski,et al.  ASSESSMENT OF AGING CORRECTION FACTORS FOR LIQUEFACTION RESISTANCE AT SITES OF RECURRENT LIQUEFACTION , 2014 .

[76]  B. Bradley Strong ground motion characteristics observed in the 4 September 2010 Darfield, New Zealand earthquake , 2012 .

[77]  D. Eberhart‐Phillips,et al.  The MW 6.2 Cass, New Zealand, earthquake of 24 November 1995: Reverse faulting in a strike‐slip region , 2000 .

[78]  Paul W. Williams,et al.  A review of New Zealand palaeoclimate from the Last Interglacial to the global Last Glacial Maximum , 2015 .

[79]  Michael Manga,et al.  Hydrological effects of the M W 7.1 Darfield (Canterbury) earthquake, 4 September 2010, New Zealand , 2012 .

[80]  Alex L. Shigo,et al.  Compartmentalization: A Conceptual Framework for Understanding How Trees Grow and Defend Themselves , 1984 .

[81]  Towards the development of design curves for characterising distributed strike-slip surface fault rupture displacement : an example from the 4 September , 2010 , Greendale Fault rupture , New Zealand , 2013 .

[82]  Charles S. Mueller,et al.  Documentation for the 2008 update of the United States National Seismic Hazard Maps , 2008 .

[83]  David A. Rhoades,et al.  Retrospective tests of hybrid operational earthquake forecasting models for Canterbury , 2016 .

[84]  Serkan B. Bozkurt,et al.  Forecasting the evolution of seismicity in southern California : Animations built on earthquake stress transfer : Stress transfer, earthquake triggering, and time-dependent seismic hazard , 2005 .

[85]  Paul Mann,et al.  Complex rupture during the 12 January 2010 Haiti earthquake , 2010 .

[86]  Pilar Villamor,et al.  National Seismic Hazard Model for New Zealand: 2010 Update , 2012 .

[87]  Paolo Pasquali,et al.  The 2010-2011 Canterbury, New Zealand, seismic sequence: Multiple source analysis from InSAR data and modeling , 2012 .

[88]  Ellen M. Rathje,et al.  Probabilistic assessment of the seismic performance of earth slopes , 2013, Bulletin of Earthquake Engineering.

[89]  Sergey V. Samsonov,et al.  THE DARFIELD (CANTERBURY) EARTHQUAKE: GEODETIC OBSERVATIONS AND PRELIMINARY SOURCE MODEL , 2010 .

[90]  Thomas H. Heaton,et al.  Relationships between Peak Ground Acceleration, Peak Ground Velocity, and Modified Mercalli Intensity in California , 1999 .

[91]  N. Ambraseys,et al.  A history of Persian earthquakes , 1982 .

[92]  David A. Rhoades,et al.  A new hybrid Coulomb/statistical model for forecasting aftershock rates , 2014 .

[93]  R. Jongens,et al.  The tectonic and structural setting of the 4 September 2010 Darfield (Canterbury) earthquake sequence, New Zealand , 2012 .

[94]  Ian G. Main,et al.  Statistical physics, seismogenesis, and seismic hazard , 1996 .

[95]  Preliminary source model of the Mw 7 . 1 Darfield earthquake from geological , geodetic and seismic data , 2011 .

[97]  Brendon A. Bradley,et al.  Strong ground motions observed in the 22 February 2011 Christchurch earthquake , 2011 .

[98]  A. Green,et al.  High-resolution seismic images of potentially seismogenic structures beneath the northwest Canterbury Plains, New Zealand , 2010 .

[99]  J. Bradshaw Cretaceous geotectonic patterns in the New Zealand Region , 1989 .

[100]  Thomas H. Heaton,et al.  Effects of Fault Dip and Slip Rake Angles on Near-Source Ground Motions: Why Rupture Directivity Was Minimal in the 1999 Chi-Chi, Taiwan, Earthquake , 2004 .

[101]  J. Sims,et al.  Recurrent liquefaction induced by the 1989 Loma Prieta earthquake and 1990 and 1991 aftershocks: Implications for paleoseismicity studies , 1995 .

[102]  D. Barrell,et al.  A 3D Geological Model for Christchurch City (New Zealand): A Contribution to the Post-earthquake Re-build , 2015 .

[103]  J. Cole,et al.  Lyttelton Volcano, Banks Peninsula, New Zealand: Primary volcanic landforms and eruptive centre identification , 2009 .

[104]  M. Stein,et al.  Long-term earthquake clustering: A 50,000-year paleoseismic record in the Dead Sea Graben , 1996 .

[105]  K. Hudnut,et al.  Assembly of a large earthquake from a complex fault system: Surface rupture kinematics of the 4 April 2010 El Mayor–Cucapah (Mexico) Mw 7.2 earthquake , 2014 .

[106]  Alan R. Nelson,et al.  Great earthquakes of variable magnitude at the Cascadia subduction zone , 2005, Quaternary Research.

[107]  Ronald D. Andrus,et al.  Updated Liquefaction Resistance Correction Factors for Aged Sands , 2009 .

[108]  C. Williams,et al.  The Pegasus Bay aftershock sequence of the Mw 7.1 Darfield (Canterbury), New Zealand earthquake , 2013, Geophysical Journal International.

[109]  M. Quigley,et al.  Seismically induced boulder displacement in the Port Hills, New Zealand during the 2010 Darfield (Canterbury) earthquake , 2012 .

[110]  C. Thurber,et al.  Crustal stress and fault strength in the Canterbury Plains, New Zealand , 2013 .

[111]  R. Langridge,et al.  Late Holocene Rupture History of the Alpine Fault in South Westland, New Zealand , 2012 .

[112]  D. Vere-Jones,et al.  Some examples of statistical estimation applied to earthquake data , 1982 .

[113]  A. Nicol Haumurian (c. 66–80 Ma) half‐graben development and deformation, mid Waipara, North Canterbury, New Zealand , 1993 .

[114]  Yosihiko Ogata,et al.  Statistical Models for Earthquake Occurrences and Residual Analysis for Point Processes , 1988 .

[115]  M. Stirling,et al.  Do great earthquakes occur on the Alpine fault in central South Island, New Zealand? , 2013 .

[116]  Domenico Giardini,et al.  Setting the Stage for Harmonized Risk Assessment by Seismic Hazard Harmonization in Europe (SHARE) , 2010 .

[117]  R. Langridge,et al.  Surface rupture displacement on the Greendale Fault during the Mw 7.1 Darfield (Canterbury) earthquake, New Zealand, and its impact on man-madestructures. , 2011 .

[118]  Jose G. Aguilera The Sonora Earthquake of 1887 , 1920, Bulletin of the Seismological Society of America.

[119]  F. Ghisetti,et al.  Compressional reactivation of E–W inherited normal faults in the area of the 2010–2011 Canterbury earthquake sequence , 2012 .

[120]  B. Mackey,et al.  Strong proximal earthquakes revealed by cosmogenic 3He dating of prehistoric rockfalls, Christchurch, New Zealand , 2014 .

[121]  M. Quigley,et al.  Coseismic landsliding during the Mw 7.1 Darfield (Canterbury) earthquake: Implications for paleoseismic studies of landslides , 2014 .

[122]  Stephen H. Hartzell,et al.  Rupture History of the 2008 Mw 7.9 Wenchuan, China, Earthquake: Evaluation of Separate and Joint Inversions of Geodetic, Teleseismic, and Strong-Motion Data , 2013 .

[123]  W. F. Marcuson,et al.  Liquefaction Resistance of Soils: Summary Report from the 1996 NCEER and 1998 NCEER/NSF Workshops on Evaluation of Liquefaction Resistance of Soils , 2001 .

[124]  A. Nicol,et al.  Paleoseismology of the 2010 Mw 7.1 Darfield (Canterbury) earthquake source, Greendale Fault, New Zealand , 2014 .

[125]  John H. Shaw,et al.  Earthquake hazards of active blind-thrust faults under the central Los Angeles basin , 1996 .

[126]  C. Holden Kinematic Source Model of the 22 February 2011 Mw 6.2 Christchurch Earthquake Using Strong Motion Data , 2011 .

[127]  R. Dissen,et al.  Previously Unknown Fault Shakes New Zealand's South Island , 2010 .

[128]  Brendon A. Bradley,et al.  GEOTECHNICAL ASPECTS OF THE 22 FEBRUARY 2011 CHRISTCHURCH EARTHQUAKE , 2011 .

[129]  R. Bürgmann,et al.  Interactions between the Landers and Hector Mine, California, Earthquakes from Space Geodesy, Boundary Element Modeling, and Time-Dependent Friction , 2002 .

[130]  Mary Rakowski DuBois,et al.  Near-Field Deformation from the El Mayor-Cucapah Earthquake Revealed by Differential LIDAR , 2012 .

[131]  J. C. Savage,et al.  Geodetic estimate of coseismic slip during the 1989 Loma Prieta, California, Earthquake , 1990 .

[132]  C. Thurber,et al.  Temporal and spatial evolution of hypocentres and anisotropy from the Darfield aftershock sequence: implications for fault geometry and age , 2012 .

[133]  D. Barker,et al.  Subsurface structure of the Canterbury region interpreted from gravity and aeromagnetic data , 2012 .

[134]  R. Wood,et al.  The geological setting of the Darfield and Christchurch earthquakes , 2012 .

[135]  Gianluca Valensise,et al.  An inventory of river anomalies in the Po Plain, Northern Italy: evidence for active blind thrust faulting , 2003 .

[136]  A. Kaiser,et al.  Stress Release and Source Scaling of the 2010–2011 Canterbury, New Zealand Earthquake Sequence from Spectral Inversion of Ground Motion Data , 2014, Pure and Applied Geophysics.

[137]  Pre-2010 historical seismicity near Christchurch, New Zealand: the 1869 M W 4.7–4.9 Christchurch and 1870 M W 5.6–5.8 Lake Ellesmere earthquakes , 2012 .

[138]  Eric J. Fielding,et al.  Fault slip models of the 2010–2011 Canterbury, New Zealand, earthquakes from geodetic data and observations of postseismic ground deformation , 2012 .

[139]  R. E. Wallace Grouping and migration of surface faulting and variations in slip rates on faults in the Great Basin province , 1987 .

[140]  J. R. Feucht,et al.  ROOT SYSTEMS OF TREES-FACTS AND FALLACIES , 1989 .

[141]  Kenneth W. Hudnut,et al.  High-Resolution Topography along Surface Rupture of the 16 October 1999 Hector Mine, California, Earthquake (Mw 7.1) from Airborne Laser Swath Mapping , 2002 .

[142]  R. Langridge,et al.  Liquefaction Features Produced by the 2010–2011 Canterbury Earthquake Sequence in Southwest Christchurch, New Zealand, and Preliminary Assessment of Paleoliquefaction Features , 2016 .

[143]  Kelvin Berryman,et al.  Probabilistic seismic hazard assessment of the Canterbury region, New Zealand , 2001 .

[144]  R. Robinson,et al.  The enigma of the Arthur's Pass, New Zealand, earthquake: 2. The aftershock distribution and its relation to regional and induced stress fields , 2000 .

[145]  G. Jacoby,et al.  Tree-ring evidence for an A.D. 1700 Cascadia earthquake in Washington and northern Oregon , 1997 .

[146]  J. Pettinga,et al.  Faulting and folding beneath the Canterbury Plains identified prior to the 2010 emergence of the Greendale Fault , 2012 .

[147]  Robert B. Herrmann,et al.  Using regional moment tensors to constrain the kinematics and stress evolution of the 2010–2013 Canterbury earthquake sequence, South Island, New Zealand , 2014 .

[148]  Ignacio Arango,et al.  Magnitude Scaling Factors for Soil Liquefaction Evaluations , 1996 .

[149]  Mihailo D. Trifunac,et al.  Evolution of accelerographs, data processing, strong motion arrays and amplitude and spatial resolution in recording strong earthquake motion ☆ , 2001 .

[150]  D. Wells,et al.  New empirical relationships among magnitude, rupture length, rupture width, rupture area, and surface displacement , 1994, Bulletin of the Seismological Society of America.

[151]  Robert W. Graves,et al.  Implications of the Northridge earthquake for strong ground motions from thrust faults , 1996, Bulletin of the Seismological Society of America.

[152]  B. Duffy The Structural and Geomorphic Development of Active Collisional Orogens, from Single Earthquake to Million Year Timescales, Timor Leste and New Zealand , 2012 .

[153]  A. Pitarka,et al.  Broadband Ground-Motion Simulation Using a Hybrid Approach , 2010 .

[154]  N. Ambraseys Engineering seismology: Part II , 1988 .

[155]  Brendon A. Bradley,et al.  Near-source Strong Ground Motions Observed in the 22 February 2011 Christchurch Earthquake , 2011 .

[156]  A. Nicol,et al.  Holocene paleoearthquakes on the strike‐slip Porters Pass Fault, Canterbury, New Zealand , 2005 .

[157]  J. Boatwright,et al.  The Persistence of Directivity in Small Earthquakes , 2007 .

[158]  D. J. Andrews,et al.  Physical Limits on Ground Motion at Yucca Mountain , 2007 .

[159]  Misko Cubrinovski,et al.  Geotechnical reconnaissance of the 2010 Darfield (Canterbury) earthquake , 2010 .

[160]  David A. Rhoades,et al.  Determining Rockfall Risk in Christchurch Using Rockfalls Triggered by the 2010–2011 Canterbury Earthquake Sequence , 2014 .

[161]  D. Keefer,et al.  Investigating Landslides Caused by Earthquakes – A Historical Review , 2002 .

[162]  S. Martin,et al.  Prolonged Canterbury earthquake sequence linked to widespread weakening of strong crust , 2014 .

[163]  Springer Basel,et al.  On Chinese Earthquake History - An Attempt to Model an Incomplete Data Set by Point Process Analysis , 1979 .

[164]  Brendon A. Bradley,et al.  Fines-content effects on liquefaction hazard evaluation for infrastructure in Christchurch, New Zealand , 2015 .

[165]  David A. Rhoades,et al.  Seismic Hazard Modeling for the Recovery of Christchurch , 2014 .

[166]  J. Avouac,et al.  Under the Hood of the Earthquake Machine: Toward Predictive Modeling of the Seismic Cycle , 2012, Science.

[167]  N. Ambraseys,et al.  Value of Historical Records of Earthquakes , 1971, Nature.

[168]  Brendon A. Bradley,et al.  Evaluation of the Liquefaction Potential Index for Assessing Liquefaction Hazard in Christchurch, New Zealand , 2014 .

[169]  Rolando P. Orense,et al.  Relationship between observed liquefaction at Kaiapoi following the 2010 Darfield earthquake and former channels of the Waimakariri River , 2012 .

[170]  Brendon A. Bradley,et al.  Recurrent liquefaction in Christchurch, New Zealand, during the Canterbury earthquake sequence , 2013 .