3 ms·
The cascadia subduction zone extends from north of Vancouver island to NorCal. The sound is expected to see 8+ on the Richter scale. So they'll probably have to
by jasonwatkinspdx 3y ago
The cascadia subduction zone extends from north of Vancouver island to NorCal. The sound is expected to see 8+ on the Richter scale. So they'll probably have too many of their own problems to lend help to Portland.
- ianburrell 3y agoBTW, the quake won't be that strong at Seattle and Portland. The subduction quake could be up to magnitude 9 but that is off the coast and over the mountains. I have seen estimates of magnitude 7-7.5 shaking in Portland. However, it will be 5 minutes of shaking which will liquefy soils. The result is that most buildings in Portland will survive. Only unreinforced masonry and liquefaction areas will have serious damage. The quake is survivable, the problem is infrastructure wasn't built with quake in mind.