Hi Canie. This may be what you’re looking for. Take Care…Don in creepy town

Geologist Brian F. Atwater, USGS scientist and UW affiliate faculty member, started searching in 1986 for evidence of ancient quakes in the Pacific Northwest. Atwater looked along the Washington coast at creek sediments, with the rationale that he might find the tell-tale signs of land rising or dropping, signs that have been found in other subduction zones where massive quakes have occurred.

In 1987, Atwater reported that Washington's Pacific coast appeared to have subsided repeatedly in the past several thousand years. Along with UW geology professor Joanne Bourgeois, he also found that some of the subsidence events were accompanied by tsunamis that deposited sand on coastal land. The most recent such event happened about 300 years ago. UW's radiocarbon lab, directed by geology professor Minze Stuiver, has provided the most precise age measurements obtained for this event. Stuiver's lab dated coastal trees that were killed when the land suddenly dropped and plunged their roots into salt water. The average interval is about 500 years but individual intervals have been as large as 1,000 years and as short as a couple of centuries.

• Ancient Quakes