4 September 2010 4.35am NZT Magnitude 7.1 Depth 11km Epicentre around 40km west of Christchurch

4 September 2010 4.35am NZT

Magnitude 7.1

Depth 11km

Epicentre around 40km west of Christchurch

Human toll: 0 deaths, 2 serious injuries

Estimated financial cost: approx. NZ $4 billion

*

* M 7.1 epicentre

A

B

A = Highfield Road, B = Homebush, C = Halswell Rd

C

www.geonet. … /var/storage/images/media/images/news/2010/map_of_fault_20100912/44957-3-eng-GB/map_of_fault_20100912.jpg

photo V Wood

Fault displacement at Highfield Rd

Homebush homestead (W of Darfield)

APN/The Star, Earthquake - September 4, 2010

Liquefaction by Halswell Rd - photo A Wood

Liquefaction

- under extreme shaking, water stopsbinding fine sand particles(get a slurry of fine sand /silt)

- under compression,excess water (carryingfine sand / silt with it)explodes through soilsurface in ‘sand volcanoes’

A

B

APN/The Star, Earthquake - September 4, 2010

Buckled Avonside footbridge,and Kaiapoi house affected bylateral slumping

C,D

St Peter’s Church, Riccarton - photo V Wood

Inside the James Hight Library,University of Canterbury- photo [UC] Chronicle 24 Sept 2010