EQ response Flashcards
Convergent boundary
2+ plates moving towards each other and colliding (usually butt up against each other (continental crust) or one dives below the other (oceanic crust goes under continental because made of heavier material)
true or false: NZ has few active faults
False. has many
Plates move on average at the rate of…
Fingernail growth
Magnitude
amount of energy released by EQ at epicenter (NOTE: with long faults this is dependant on how much they move)
Intensity
how much damage is done to the built environment by ground shaking (measured on Mercalli scale, damage dependent on distance from epicentre and local ground conditions)
Magnitude measured on ____ scale, that is ____
magnitude; logarithmic (e.g. 0.2 increase = double amount of seismic energy)
ChCh EQ was how costly and what magnitude
2nd most costly in world and 6.1
Civil defence emergency framework
- Reduction (before - building zones, education)
- Readiness (before - preparedness, warning systems)
Response (after - community, search and rescue, temporary housing)
ChCh EQ date
initial shock: Sep 4, 2010 (building damage and liquefaction)
Worst shock: Feb 22, 2011 (185 casualties, loss 1000+ heritage buildings)
Liquefaction
Soil behaves more like liquid during EQ (causes surface cracking)
ChCh EQ caused
changes to Building Act (engineering lesson)
Kaikoura EQ date
November 14, 2016
Kaikoura EQ caused
Unreinforced Masonry (URM) strengthening project in Wellington due to building damaged
Alpine Fault magnitude 8
programme of scientific modelling, response planning and community engagement in south island to build resilience for future events
East Coast LAB
programme to prepare for coastal hazards and build community resilience
