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What lies beneath:          Making sense of the Canterbury Earthquake Sequence            Kelvin Berryman, Director, Natur...
New Zealand         tectonic                                                                         Raukumara          se...
Seismics & the City, 2013   Natural Hazards Research Platform                                                  GNS Science
Highfield Road,     Sept 4th 2010                                          Quigley et al, UoC & GNS         4.5 m dextral ...
Boxing Day and                                                                    subsequent   Chances of a M6+ in 1 year ...
Seismics & the City, 2013   Natural Hazards Research Platform                                                  GNS Science
February and June fault slip inversions from GPS data   – can also be compared with seismology and InSar                  ...
Reasons for very strong shaking in Christchurch       weak sedimentary rocks,       soft soils & high water table         ...
Barnes et al, 2011    Regional                                                 Hikurangi    Fault                         ...
Seismics & the City, 2013   Natural Hazards Research Platform                                                  GNS Science
Magnitude vs Time ( up to February 2013 )   Magnitude                                           generally felt            ...
Seismics & the City, 2013   Natural Hazards Research Platform                                                  GNS Science
6.5 Ka                 New Zealand Historical Atlas 1997                                     7 Ka                         ...
Subsurface conditions in central Christchurch are now well known and not especially difficult for rebuildingSeismics & the...
Questions …………….Seismics & the City, 2013       Natural Hazards Research Platform                                         ...
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Dr Kelvin Berryman, Director Natural Hazards, GNS Science - presentation at Seismics and the City 2013

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"What's underneath? Understanding seismic science' - Christchurch 21 March 2013.
View video at http://www.youtube.com/watch?v=KdxaPWQ1q5I

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Transcript of "Dr Kelvin Berryman, Director Natural Hazards, GNS Science - presentation at Seismics and the City 2013"

  1. 1. What lies beneath: Making sense of the Canterbury Earthquake Sequence Kelvin Berryman, Director, Natural Hazards Research Platform 22 Feb, 2011Seismics & the City, 2013 Natural Hazards Research Science GNS Platform
  2. 2. New Zealand tectonic Raukumara setting Peninsula CVR/TVZ North Island Dextral Fault Belt ea i at ng GPS strain u P l ura Marlborough k Hi strike-slip Chatham Rise Southern Alps Fiordland Image from NIWA National Institute of Water and Atmospheric Research LtdSeismics & the City, 2013 Natural Hazards Research Platform GNS Science
  3. 3. Seismics & the City, 2013 Natural Hazards Research Platform GNS Science
  4. 4. Highfield Road, Sept 4th 2010 Quigley et al, UoC & GNS 4.5 m dextral & < 1 m verticalSeismics & the City, 2013 Natural Hazards Research Platform GNS Science
  5. 5. Boxing Day and subsequent Chances of a M6+ in 1 year = This number was widely communicated but 25% in the aftershock region what did it mean – no scenario models in terms of impact were developedSeismics & the City, 2013 Natural Hazards Research Platform GNS Science
  6. 6. Seismics & the City, 2013 Natural Hazards Research Platform GNS Science
  7. 7. February and June fault slip inversions from GPS data – can also be compared with seismology and InSar Interpretation by Beaven et al., GNSSeismics & the City, 2013 Natural Hazards Research Platform GNS Science
  8. 8. Reasons for very strong shaking in Christchurch weak sedimentary rocks, soft soils & high water table Christchurch volcanic rocks greywacke bedrockSeismics & the City, 2013 Natural Hazards Research Platform GNS Science
  9. 9. Barnes et al, 2011 Regional Hikurangi Fault Subduction margin Patterns Wellington Christchurch Alpine Fault Jongens et al, 2012Seismics & the City, 2013 Natural Hazards Research Platform GNS Science
  10. 10. Seismics & the City, 2013 Natural Hazards Research Platform GNS Science
  11. 11. Magnitude vs Time ( up to February 2013 ) Magnitude generally felt often not felt incomplete detection • More than 2 years of aftershocks have had major psycho-social impactsSeismics & the City, 2013 Natural Hazards Research Platform GNS Science
  12. 12. Seismics & the City, 2013 Natural Hazards Research Platform GNS Science
  13. 13. 6.5 Ka New Zealand Historical Atlas 1997 7 Ka 5 Ka 8 Ka 3 Ka 2 Ka 1 Ka Why is liquefaction such an issue in eastern Christchurch?Seismics & the City, 2013 Natural Hazards Research Platform GNS Science
  14. 14. Subsurface conditions in central Christchurch are now well known and not especially difficult for rebuildingSeismics & the City, 2013 Natural Hazards Research Platform GNS Science
  15. 15. Questions …………….Seismics & the City, 2013 Natural Hazards Research Platform GNS Science

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