2 ms·
Seattle and Vancouver need to plan for 8+ earthquakes. There shouldn't be a single brick building in either city.
by idlewords 9y ago
Seattle and Vancouver need to plan for 8+ earthquakes. There shouldn't be a single brick building in either city.
- njarboe 9y agoThere have been seven large Cascadia subduction zone earthquakes in the last 3500 yrs or so. About a 500 year repeat interval. The last one was in precisely 1700, known from historical records. So, on average, the next one would be in 200 yrs (but could come tomorrow or even further into the future). Building new construction to survive such a quake is probably a good idea, but tearing down old ones seems like not the best investment in resources given such a low probability event.