On June 23 , 1946 , a magnitude 7.2 earthquake centred to the east of Strathcona Park , caused a slide which resulted in 1.5 million cubic metres ( 53 million cubic feet ) of rock , about half of which found its way to Landslide Lake below . The slide and a huge displacement wave caused devastation in the upper Elk Valley . The damage is clearly visible to this day
magnitude 7.2 earthquake
1946 Vancouver Island earthquake
Mount Colonel Foster