<P> Yet another ghost forest was identified by Gordon Jacoby, a dendrochronologist from Columbia University, 60 feet (18 m) underwater in Lake Washington . Unlike the other trees, these suffered from a landslide rather than a dip in the fault during a separate event around 900 CE . </P> <P> A 1996 study published by seismologist Kenji Satake supplemented the research by Atwater et al. with tsunami evidence across the Pacific . Japanese annals, which have recorded natural disasters since approximately 600 CE, had reports of a sixteen - foot tsunami that struck the coast of Honshu Island during the Genroku . Since no earthquake had been observed to produce it, scholars dubbed it an "orphan tsunami ." Translating the Japanese calendar, Satake found the incident had taken place around midnight of 27--28 January 1700, ten hours after the earthquake occurred . </P> <P> The Cascadia Subduction Zone (CSZ) is a 1,000 km (620 mi) long dipping fault that stretches from Northern Vancouver Island to Cape Mendocino in northern California . It separates the Juan de Fuca and North America plates . New Juan de Fuca plate is created offshore along the Juan de Fuca Ridge . </P> <P> The Juan de Fuca plate moves toward, and eventually is shoved beneath, the continent (North American plate). The zone separates the Juan de Fuca Plate, Explorer Plate, Gorda Plate, and North American Plate . Here, the oceanic crust of the Pacific Ocean has been sinking beneath the continent for about 200 million years, and currently does so at a rate of approximately 40 mm / yr . </P>

What type of fault is the cascadia subduction zone