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Images for shaking; more images...

Images, eqnz.chch.2010

Repairs being carried out on this restaurant (converted from a church) at the Hereford Street / Manchester Street intersection;aftermath of the magnitude 7.1 earthquake that struck Christchurch on Saturday 4 September 2010.

Images, eqnz.chch.2010

Heaving and subsidence on the faultline left scars where the magnitude 7.1 earthquake on Saturday 4 September 2010 originated.

Images, eqnz.chch.2010

Toppled grain silos on the outskirts of Darfield near the epicentre of the magnitude 7,1 earthquake that struck on Saturday 4 September 2010.

Images, eqnz.chch.2010

Toppled grain silos on the outskirts of Darfield near the epicentre of the magnitude 7,1 earthquake that struck on Saturday 4 September 2010.

Images, eqnz.chch.2010

Toppled grain silos on the outskirts of Darfield near the epicentre of the magnitude 7,1 earthquake that struck on Saturday 4 September 2010.

Images, eqnz.chch.2010

Toppled grain silos on the outskirts of Darfield near the epicentre of the magnitude 7,1 earthquake that struck on Saturday 4 September 2010.

Images, eqnz.chch.2010

The latest (but temporary) tourist attraction in mid-Canterbury! This was the previously unknown faultline where the Saturday 4 September 2010 earthquake originated.

Videos, eqnz.chch.2010

At Greendale Faultline on Highfield Road in mid-Canterbury, where the magnitude 7.1 earthquake on 4 September 2010 originated.

Videos, eqnz.chch.2010

At Greendale Faultline on Highfield Road in mid-Canterbury, where the magnitude 7.1 earthquake on 4 September 2010 originated.

Images, eqnz.chch.2010

Toppled grain silos on the outskirts of Darfield near the epicentre of the magnitude 7,1 earthquake that struck on Saturday 4 September 2010.

Images, eqnz.chch.2010

Tension cracks at least 300 mm deep, on the previously unknown faultline from which the Saturday 4 September 2010 earthquake originated.

Images, eqnz.chch.2010

This beautiful building on Madras Street is red stickered and may be condemned if the structural damage it suffered in the magnitude 7,1 earthquake on Saturday 4 September 2010 cannot be repaired.

Images, eqnz.chch.2010

Toppled grain silos on the outskirts of Darfield near the epicentre of the magnitude 7,1 earthquake that struck on Saturday 4 September 2010.

Images, eqnz.chch.2010

This beautiful building on Madras Street is red stickered and may be condemned if the structural damage it suffered in the magnitude 7,1 earthquake on Saturday 4 September 2010 cannot be repaired.

Images, eqnz.chch.2010

On the way to Darfield to locate the faultline where the tectonic plates slipped, causing the magnitude 7.1 earthquake on Saturday 4 September 2010.

Images, eqnz.chch.2010

This beautiful building on Madras Street is red stickered and may be condemned if the structural damage it suffered in the magnitude 7,1 earthquake on Saturday 4 September 2010 cannot be repaired.

Research papers, University of Canterbury Library

A major hazard accompanying earthquake shaking in areas of steep topography is the detachment of rocks from bedrock outcrops that subsequently slide, roll, or bounce downslope (i.e. rockfalls). The 2010-2011 Canterbury earthquake sequence caused recurrent and severe rockfall in parts of southern Christchurch. Coseismic rockfall caused five fatalities and significant infrastructural damage during the 2011 Mw 6.2 Christchurch earthquake. Here we examine a rockfall site in southern Christchurch in detail using geomorphic mapping, lidar analysis, geochronology (cosmogenic 3He dating, radiocarbon dating, optically stimulated luminescence (OSL) from quartz, infrared stimulated luminescence from K-feldspar), numerical modeling of rockfall boulder trajectories, and ground motion prediction equations (GMPEs). Rocks fell from the source cliff only in earthquakes with interpolated peak ground velocities exceeding ~10 cm/s; hundreds of smaller earthquakes did not produce rockfall. On the basis of empirical observations, GMPEs and age chronologies we attribute paleo-rockfalls to strong shaking in prehistoric earthquakes. We conclude that earthquake shaking of comparable intensity to the strongest contemporary earthquakes in Christchurch last occurred at this site approximately 5000 to 7000 years ago, and that in some settings, rockfall deposits provide useful proxies for past strong ground motions.

Videos, UC QuakeStudies

A video capturing an aftershock from the Canterbury earthquake on 13 June 2011, 2:20 pm. A strong shake after lunch time caused Ben Post to set up his camera in his workplace, capturing this aftershock. The camera is mounted on a small sturdy tripod on top of a table with wheels.

Images, eqnz.chch.2010

Looking across the faultline where the Saturday 4 September 2010 magnitude 7.1 earthquake originated. Note how much the previously straight fence is now out of alignment.