Canterbury earthquake (magnitude7.1), Darfield-Christchurch Sept - - PowerPoint PPT Presentation

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Canterbury earthquake (magnitude7.1), Darfield-Christchurch Sept - - PowerPoint PPT Presentation

Aug 24, 2022 48 likes •586 views

Canterbury earthquake (magnitude7.1), Darfield-Christchurch Sept 4, 2010 A photographical account from a visit on Sept 8, 2010 By: P. Marinos, R. Rodogianni, G. Tsiambaos, N. Sabatakakis & B. Christaras The area The fault Strike slip

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Canterbury earthquake (magnitude7.1), Darfield-Christchurch Sept 4, 2010

A photographical account from a visit on Sept 8, 2010

By: P. Marinos, R. Rodogianni, G. Tsiambaos, N. Sabatakakis & B. Christaras

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The area

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The fault

Strike slip right lateral about 3 m horizontal offset. En

  • echelon. Observed length 13km

Vertical displacement of about few 10s of cm,

Small inverse component. Width of zone of deformations 10-30m (on sites inspected)

Surface rupture on Glaciation surface 18000 old

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En echelon features of the fault

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The width of deformations associated with the en echelon development of the fault rupture

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Signs of the local inverse component

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Signs of the local inverse component

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Signs of the local inverse component

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One of the bigger vertical displacement in the fault zone

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One of the bigger vertical displacement in the fault zone

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Trees unrooted in the course of the fault

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The liquefaction

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Failure of embankment of Waimakariri river due to liquefaction of its surroundings. Lateral spreading assisted

The river is just at the left side of photo.

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Failure of embankment of Waimakariri river due to liquefaction of its surroundings. Lateral spreading assisted

The river is just at the left side of photo.

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Subsidence of the frontal part of the house, Kaiapoi

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Subsidence due to liquefaction, Kaiapoi

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Liquefaction affected pavements and streets

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Kaiapoi

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Lateral spreading

Mainly due to liquefaction

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Failure of embankment of Waimakariri river due to lateral

  • spreading. Liquefaction affected its environment.

The river is just at the left side of photo.

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Failure of embankment of Waimakariri river due to lateral

  • spreading. Liquefaction affected its environment.

The river is just at the left side of photo.

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Failure of embankment of Waimakariri river due to lateral

  • spreading. Liquefaction affected its environment.

The river is just at the right side of photo.

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Fissures from lateral spreading

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Fissure from lateral spreading. The river bank is at the right, in a distance of about 150m

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Lateral spreading. A canal can be seen on the right

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Lateral spreading. Due to the provoked subsidence the banks got new position, covering the trunks of trees

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Lateral spreading towards the canal which is in front of the undermined house, in a distance of about 50m

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Lateral spreading that reached and undermined the house (with this simple, laying on ground, foundation)

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With thanks to Ed Ladley for his contribution to have this visit effective

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An other disaster to improve our knowledge…… ……for the hope of the future

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