Subduction zone earthquakes off Oregon, Washington more frequent than previous estimates


Image of an earthquake damaged building. Credit; Getty Images.

(Oregon State University) A new analysis suggests that massive earthquakes on northern sections of the Cascadia Subduction Zone, affecting areas of the Pacific Northwest that are more heavily populated, are somewhat more frequent than has been believed in the past. The chance of one occurring within the next 50 years is also slightly higher than previously estimated.