Geological Survey Of Canada Open File 6343

Geological Survey of Canada, Open File 6343

Submarine Mass Movements and Their Consequences

Submarine mass movements represent major offshore geohazards due to their destructive and tsunami-generation potential. This potential poses a threat to human life as well as to coastal, nearshore and offshore engineering structures. Recent examples of catastrophic submarine landslide events that affected human populations (including tsunamis) are numerous; e.g., Nice airport in 1979, Papua-New Guinea in 1998, Stromboli in 2002, Finneidfjord in 1996, and the 2006 and 2009 failures in the submarine cable network around Taiwan. The Great East Japan Earthquake in March 2011 also generated submarine landslides that may have amplified effects of the devastating tsunami. Given that 30% of the World’s population live within 60 km of the coast, the hazard posed by submarine landslides is expected to grow as global sea level rises. This elevated awareness of the need for better understanding of submarine landslides is coupled with great advances in submarine mapping, sampling and monitoring technologies. Laboratory analogue and numerical modeling capabilities have also developed significantly of late. Multibeam sonar, 3D seismic reflection, and remote and autonomous underwater vehicle technologies provide hitherto unparalleled imagery of the geology beneath the oceans, permitting investigation of submarine landslide deposits in great detail. Increased and new access to drilling, coring, in situ measurements and monitoring devices allows for ground-thruth of geophysical data and provides access to samples for geotechnical laboratory experiments and information on in situ strength and effective stress conditions of underwater slopes susceptible to fail. Great advances in numerical simulation techniques of submarine landslide kinematics and tsunami propagation, particularly since the 2004 Sumatra tsunami, have also lead to increased understanding and predictability of submarine landslide consequences. This volume consists of the latest scientific research by international experts in geological, geophysical, engineering and environmental aspects of submarine mass failure, focused on understanding the full spectrum of challenges presented by submarine mass movements and their consequences.

Breaking the Ice

The Hill Times: Best Books of 2017 The Arctic seabed, with its vast quantities of undiscovered resources, is the twenty-first century’s frontier. In Breaking the Ice: Canada, Sovereignty and the Arctic Extended Continental Shelf, Arctic policy expert Elizabeth Riddell-Dixon examines the political, legal, and scientific aspects of Canada’s efforts to delineate its Arctic extended continental shelf. The quality and quantity of the data collected and analyzed by the scientists and legal experts preparing Canada’s Arctic Submission for the Commission on the Limits of the Continental Shelf, and the extensive collaboration with Canada’s Arctic neighbours is a good news story in Canadian foreign policy. As Arctic sovereignty continues to be a key concern for Canada and as the international legal regime is being observed by all five Arctic coastal states, it is crucial to continue to advance our understanding of the complex issues around this expanding area of national interest.