The altitude of Portland civic center is 20 ft the Columbia River is about 15'. I wonder what the tidal bore on the Columbia River would look like with a 30' Tsunami?
May as well throw Portland in too.
Portland is a good hundred miles inland from the ocean. Not much chance of a tsunami hitting there, nomatter how much they need it. :-)
San Francisco and LA.
Geologists have found that tsunamis in past have come up the Columbia River as far as Portland.
The last subduction zone quake was in 1700 and we are about 50 or 60 years overdue for another.
Portland isn’t going to escape damage if Seattle gets hit. One thing I learned recently about subduction zone quakes is that they don’t do as much damage to buildings as the more shallow, crustal quakes do.
The altitude of Portland civic center is 20 ft the Columbia River is about 15'. I wonder what the tidal bore on the Columbia River would look like with a 30' Tsunami?