Researchers in New Zealand aim to create 3D simulations that will transform earthquake modelling for sedimentary basins.

The study centres on the North Island’s Hamilton Basin, which spans about 50km and reaches depths of 1.6km. Its shape makes it susceptible to amplification of seismic waves, a phenomenon known as the “basin effect”.

“With a significant population and extremely important infrastructure for the country like roads, trains, gas and transmission lines running through this area, it is important to make it more resilient against potential earthquakes,” Waikato University PhD student Dave Gardiner said.

The Waikato research team, led by Andrew La Croix, is studying basin sediments to more accurately predict how the ground will shake during quakes, after several fault lines were revealed during construction of a road.

The research is unique due to its use of forward modelling techniques adapted from the energy industry and a “treasure trove” of information produced during petroleum exploration decades ago to start computer modelling. 

“We were able to use modern technology to digitally enhance this data and give us a nucleus of information from which to extrapolate ... down to the Jurassic-age basement rocks which underlie the region,” Mr Gardiner said.

EQC Toka Tu Ake head of research Natalie Balfour says the government insurer, which is funding the research, is "working hard to better understand hazards and look for ways to minimise their impact on communities and property”.

From Insurance News magazine: How the White Island volcano tragedy set a new standard on trauma reparations