Interesting article. Like the land in Japan which sunk and remains under sea, the Oregon and Washington coast will also sink, putting some coastline under water. The area we ride horses on the beach has some big stumps where there used to be a forest. The stumps are under water at high tide.
I learned about this from a special program NOVA just did about the Japan earthquake and tsunami.... maybe you can find it at the PBS website. I know they have shakers up in Washington sometimes, but are not as well known as our EQs here in California. It feels like we are SOOOOOO overdue.