An expert who studies landslides says last Saturday's incident in Whitehorse wasn't the first and likely won't be the last. John Clague is a retired professor of earth sciences at Simon Fraser University who specializes in geological hazards such as earthquakes, tsunamis, landslides and floods. He saw pictures of the landslide and said he was surprised at the amount of water that was in the sliding material. He was also surprised by how far it went, crossing Robert Service Way, the Millennium Trail and spilling into the Yukon River.