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Research papers, University of Canterbury Library

Welcome to the Recover issue 3 newsletter from the Marine Ecology Research Group (MERG) at the University of Canterbury. Recover is designed to keep you updated on our MBIE funded earthquake recovery project called RECOVER (Reef Ecology, Coastal Values & Earthquake Recovery). In this third instalment we are looking into recent paua, whitebait, and … work our team has undertaken.

Images, eqnz.chch.2010

Telegraph Road was a straight road before the recent 7.1 magnitude earthquake. The fault ran right through here and now the road has a dramatic kink in it.

Images, eqnz.chch.2010

The September Canterbury earthquake. These pictures were taken of Colombo Street in Sydenham. A lot of masonry in this area has been damaged/fallen down. The New Zealand Army, along with Police, were minding the cordons. Note: these photos were taken on a cellphone; mind the quality.

Images, eqnz.chch.2010

The September Canterbury earthquake. These pictures were taken of Colombo Street in Sydenham. A lot of masonry in this area has been damaged/fallen down. The New Zealand Army, along with Police, were minding the cordons. Note: these photos were taken on a cellphone; mind the quality.

Images, eqnz.chch.2010

The September Canterbury earthquake. These pictures were taken of Colombo Street in Sydenham. A lot of masonry in this area has been damaged/fallen down. The New Zealand Army, along with Police, were minding the cordons. Note: these photos were taken on a cellphone; mind the quality.

Images, eqnz.chch.2010

The September Canterbury earthquake. These pictures were taken of The New Zealand Army, along with Police, minding the cordons. This was beside The Press building, and behind the Christchurch Cathedral. Note: these photos were taken on a cellphone; mind the quality.

Images, eqnz.chch.2010

The September Canterbury earthquake. These pictures were taken of Colombo Street in Sydenham. A lot of masonry in this area has been damaged/fallen down. A second hand dealer store. This is next to Penny Lane which had to relocate down the street. Note: these photos were taken on a cellphone; mind the quality.

Images, eqnz.chch.2010

The September Canterbury earthquake. These pictures were taken of Colombo Street in Sydenham. A lot of masonry in this area has been damaged/fallen down. The New Zealand Army, along with Police, were minding the cordons. Note: these photos were taken on a cellphone; mind the quality.

Research papers, University of Canterbury Library

This poster presents work to date on ground motion simulation validation and inversion for the Canterbury, New Zealand region. Recent developments have focused on the collection of different earthquake sources and the verification of the SPECFEM3D software package in forward and inverse simulations. SPECFEM3D is an open source software package which simulates seismic wave propagation and performs adjoint tomography based upon the spectral-element method. Figure 2: Fence diagrams of shear wave velocities highlighting the salient features of the (a) 1D Canterbury velocity model, and (b) 3D Canterbury velocity model. Figure 5: Seismic sources and strong motion stations in the South Island of New Zealand, and corresponding ray paths of observed ground motions. Figure 3: Domain used for the 19th October 2010 Mw 4.8 case study event including the location of the seismic source and strong motion stations. By understanding the predictive and inversion capabilities of SPECFEM3D, the current 3D Canterbury Velocity Model can be iteratively improved to better predict the observed ground motions. This is achieved by minimizing the misfit between observed and simulated ground motions using the built-in optimization algorithm. Figure 1 shows the Canterbury Velocity Model domain considered including the locations of small-to-moderate Mw events [3-4.5], strong motion stations, and ray paths of observed ground motions. The area covered by the ray paths essentially indicates the area of the model which will be most affected by the waveform inversion. The seismic sources used in the ground motion simulations are centroid moment tensor solutions obtained from GeoNet. All earthquake ruptures are modelled as point sources with a Gaussian source time function. The minimum Mw limit is enforced to ensure good signal-to-noise ratio and well constrained source parameters. The maximum Mw limit is enforced to ensure the point source approximation is valid and to minimize off-fault nonlinear effects.

Images, UC QuakeStudies

Detail of damage to the Canterbury Provincial Chambers buildings. The roof of the stone chamber has completely collapsed, bringing down scaffolding on the outside of the building.

Images, UC QuakeStudies

Members of the University of Canterbury's E-Learning team, Rob Stowell, Herbert Thomas and Alan Hoskin, in their temporary office in the NZi3 building. The photographer comments, "University of Canterbury administration all fits into one building! Well, sort of. Our 4-desk bay; Rob & Herbert discussing plans, Alan dealing with academic support. I've been doing Moodle admin; adding courses and users, mostly - plus occasional how-to advice".

Images, UC QuakeStudies

Members of the University of Canterbury's E-Learning team in their temporary office in the NZi3 building. The photographer comments, "University of Canterbury administration all fits into one building! Well, sort of. The e-learning corner; Alan Hoskin (learning adviser) in the foreground, some guy in a blue shirt at my desk, Rob Stowell (our video guy) arriving, Herbert Thomas (group leader), Lei Zhang (elearning developer/sysadmin)".

Images, UC QuakeStudies

Members of the University of Canterbury's E-Learning team, Jess Hollis, Alan Hoskin, Paul Nicholls and Susan Tull, in their temporary office in the NZi3 building. The photographer comments, "University of Canterbury administration all fits into one building! Well, sort of. Jess with laptop on side desk, Paul the same on the other side, Susan getting sorted, Alan on the phone. Another day in the e-learning corner".