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        Making North America | The Cascadia Subduction Zone

        Learn why an ancient earthquake that sunk a coastal rainforest into the tidal zone may portend a severe natural disaster in the Pacific Northwest today, in this video from NOVA: Making North America: Human. Underlying a “ghost forest” in Washington State is evidence of one of the worst seismic events in North America since human beings arrived here. The event traces to a long underwater crack in Earth’s crust, where the Pacific Ocean plate is trying to slide under the North American plate. Sediment core samples suggest that a severe earthquake somewhere along the fault line is overdue. This resource is part of the NOVA: Making North America Collection.

        Visit the program page here.

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