The landslide carried with it another 40 million cubic metres of rock and ice. The impact caused an earth quake of 3.9 on the Richter scale. [P207 In search Of Ancient NZ.Campball and Hutching.GNS science/Penguin.2011.]
Michael J. Crozier. "Mt Cook landslide". Te Ara — the Encyclopedia of New Zealand. Retrieved 3 May 2007.
"Aoraki/Mt Cook". Te Ara: The Encyclopedia of New Zealand. Retrieved 28 March 2010.