Civil Engineer Professor Jason Ingham discusses his extensive projects investigating seismic retrofit of structures in earthquake regions he's been to over the past 12 months, Indonesia, Chile and of course, Christchurch.
Aftershocks have continued to shake Canterbury overnight following Saturday morning's brutal 7.1 earthquake.
It's more tha 10 weeks since the seven point one magnitude Canterbury earthquake but the region continues to be shaken by aftershocks.
Four schools in quake hit Canterbury reopened today - the first since Saturday's shake closed about 165 schools in the area.