In recent years there has been increasing interest in the development of techniques, and of the understanding that underpins them, to provide early warning of large landslides.\u00a0 One key component of this has been the use of ground movement monitoring, typically using a combination of extensometers and surface movement markers, to detect movements and to infer likely future behaviour.\u00a0 In a paper just published in Landslides (Loew et al.<\/em> 2016<\/a>), Simon Loew<\/a> and his colleagues from ETH<\/a> have provided details of an unusually detailed – and successful – monitoring campaign for a rockslide in Switzerland.\u00a0 The landslide in question is the Preonzo rockslide, a 210,000 cubic metre rockslope failure that occurred near to the village of Preonzo on 15th May 2012.\u00a0 I featured this landslide at the time<\/a>, so won’t describe it again here, but the one of the failure events (but neither of the main collapses) was captured in a spectacular video:<\/p>\n