12_11 Teachers First 1

Information about 12_11 Teachers First 1

Published on November 23, 2012

Author: Dr_Dave

Source: authorstream.com

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Plate Tectonics & associated hazards: Christchurch, New Zealand David Petley Dean of Research and Wilson Professor of Hazard and Risk Blog site: http://blogs.agu.org/landslideblog/ Twitter: @davepetley : Plate Tectonics & associated hazards: Christchurch, New Zealand David Petley Dean of Research and Wilson Professor of Hazard and Risk Blog site: http ://blogs.agu.org/landslideblog / Twitter: @ davepetley Institute for Hazard, Risk and Resilience Geological setting of New Zealand: Geological setting of New Zealand GNS Science / Geonet New Zealand tectonic setting: New Zealand tectonic setting GNS Science / Geonet PowerPoint Presentation: Geology.com PowerPoint Presentation: NASA PowerPoint Presentation: NASA PowerPoint Presentation: 2007 New Zealand Seismic Hazard Map 2% in 50 year probability of excedance 2007 New Zealand Seismic Hazard Map – Christchurch 2% in 50 year probability of excedance: 2007 New Zealand Seismic Hazard Map – Christchurch 2% in 50 year probability of excedance Darfield earthquake: Darfield earthquake 4 th September 2010 ML=7.1 Depth = 10 km Peak ground acceleration = 1.26 g GNS Science PowerPoint Presentation: GNS Science Surface expression of the Darfield fault : Surface expression of the Darfield fault Image: Malcolm Teesdale Darfield earthquake fault trace: Darfield earthquake fault trace PowerPoint Presentation: GNS Science Impact: Impact Darfield earthquake losses: Darfield earthquake losses No direct deaths (1 fatal heart attack) Two serious injuries Estimated losses: Total loss: US$6500m ($5000m‐$ 7876m) 4.8% of NZ GDP Insured loss : US$3900m ($3040m‐$5500m) EQC loss: $ 1150m, remainder covered by reinsurance 3 rd highest insured loss at that time http ://earthquake-report.com/wp-content/uploads/2011/03/CATDAT-EQ-Data-1st-Annual-Review-2010-James-Daniell-03-03-2011.pdf Landslides and rockfalls: Landslides and rockfalls Darfield earthquake and aftershocks: Darfield earthquake and aftershocks GNS Science PowerPoint Presentation: GNS Science February 2011 earthquake: February 2011 earthquake Aftershock of Darfield earthquake 12:51 on 22 nd Feb 2011 ML = 6.3 at 5 km depth 10 kilometres (6 mi) south-east of the centre of Christchurch 184 people killed Geonet Peak Ground Acceleration map: Geonet Peak Ground Acceleration map GNS Science Liquefaction: Liquefaction GNS Science Why such high accelerations?: Why such high accelerations? Proximity to the city Brittleness of fault materials (near instantaneous rupture) Direction of energy release Slapdown (trampoline) – vertical accelerations Losses: Losses 184 fatalities Including 115 in the CTV building 1500 – 2000 injuries Total loss: $16billion ($15 – 20 billion) Insured loss: $ 13 billion ($11 - $16.25 billion) About 13% of GDP 156,500 buildings damaged Topography: Topography PowerPoint Presentation: GNS Science PowerPoint Presentation: GNS Science The June 2011 earthquake: The June 2011 earthquake 13 th June at 14:20 local time ML = 6.3 Depth = 6.9 km Peak acceleration = 2.13 g, 0.78 g in the city centre Losses: 1 dead, 46 injured Costs – unclear, probably about $4.4 billion Triggered further building collapses and liquefaction Many rockfalls PowerPoint Presentation: GNS Science Earthquake Commission – risk sharing: Earthquake Commission – risk sharing PowerPoint Presentation: Conclusions: GNS Science

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