Exploitation of offshore resources, development of communication and transport corridors, fishing habitat protection, and the protection of coastal communities, have all contributed to a growing interest in improved understanding of offshore geohazards, in particular seafloor mass movements and their consequences. As the petroleum industry moves into increasingly deeper waters of the world’s continental margins, the increased focus on geohazards is also absolutely necessary. We cannot prevent slides from occurring, but we can try our best to understand their triggering mechanisms, their flow patterns, and their impact, in order to reduce the potential risk to installations as well as to third parties. The term tsunami became an integrated part of the public vocabulary after December 26, 2004. Slide-generated tsunamis may in some areas pose significant threats to coastal communities.