The tsunami will have huge effect on the coast but minimal effect on Portland and Seattle. Even Astoria, on Columbia mouth, and Victoria, on Strait of Juan de F

The tsunami will have huge effect on the coast but minimal effect on Portland and Seattle. Even Astoria, on Columbia mouth, and Victoria, on Strait of Juan de Fuca won’t be affected much. Also, the quake wont be that bad in Portland and Seattle. The fault is pretty far off shore and it will feel more like a 7 in Portland. A 7 that goes on for minutes so liquefaction will be a problem. Most buildings will survive, only unreinforced masonry and liquifcation areas will collapse. The big problem is that the infrastructure is old and will fail. Most bridges and all the utility crosssings. Which means no water and power for months. But infrastructure can be upgraded. It would be possible to make Portland and Seattle like Tokyo in 2011 quake which was very similar to Cascadia quake.