Unreinforced masonry buildings are at the greatest risk of collapse during major earthquakes, and Portland still has many of them.
PORTLAND, Ore. — About 1,700 buildings have already collapsed during or after Monday’s magnitude 7.8 earthquake in Turkey, and more damage is expected as aftershocks continue.
The damage is a stark reminder of the impact expected from the next catastrophic earthquake in the Pacific Northwest. The Cascadia Subduction Zone off the Pacific coast unleashes powerful earthquakes every 250 years on average, and the most recent one was in 1700.
Unreinforced masonry buildings are at the greatest risk of collapse during major earthquakes. Turkey passed
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