Campbell River Area is famous for Ripple Rock, which was a navigational hazard for many years in an area which is heavily dependant on merchant marine activities. The Campbell River Museum has a great deal of history to offer on the 
"Ripple Rock Explosion"
April 5 1958 Video Clip from the CBC Archives
Canada's Natural History Society also has a feature page on the 1958 explosion.
In the early summer of 2008, the community participated in a re-enactment of the famous explosion.