Aerial image of rockfall caused by the earthquake on the Kaikoura coast Photo: New Zealand Defence Force
This morning's 7.5 quake was quite a shallow quake, and was the result of some complex tectonic activities between Australian and Pacific Plates colliding under New Zealand.
Dr. Mark C. Quigley is Associate Professor in Active Tectonics and Geomorphology at the School of Earth Sciences, University of Melbourne
