Storegga Slide - NGI

Risk SummarySlide consequence class Description of slide Risk results(frequency per year)Comments1st party orenviron-ment3rd partySmall:Local threat to pipe-lines andumbilicals1st party risk andenvironmental riskSlide from back wall shallowslip surface10 -5 No risk Far below Ormen Lange riskacceptance criteriaSurficial slide in back wall < 2·10 -2 No risk Risk is acceptable, but detailedNo riskevalua-tions of technical solutionsare ongoingClay drape failures (in steepareas)To beeva-luated