Abstract
Probabilistic analyses of underwater landslides can yield probability distributions of landslide tsunami amplitudes. About 35% of all earthquakes may generate landslide tsunamis with a maximum tsunami amplitude that surpasses vertical coseismic displacement. A finite probability exists for underwater landslides to generate tsunamis with amplitudes in excess of 10 meters, as in the 1998 Papua New Guinea event. Indicators of prospective tsunamigenic landslides, such as sediment shear strength, improve our ability to predict future events and to assess their impact on coastal populations and infrastructure. Probabilistic analyses may play an important role in tsunami risk assessment from landslide tsunamis.
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