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Tsunami threat: giant wave
USC researchers have found a correlation between tsunami severity and the width of the outer wedge — the area between the continental shelf and deep trenches where large tsunamis emerge — that helps explain how underwater seismic events generate large tsunamis. (Photo/iStock)

Tsunami threats are greatly underestimated in current models, new research shows

An analysis of historical seismic events by a USC Dornsife scientist helps explain why large tsunamis still occur after relatively small earthquakes.