CASCADIAN RESPONSE 1: Event +60 minutes
Priorities: Make initial notifications Activate Cascadian Emergency Response System (CERS)
top of page
Cascadia Subduction Zone Earthquake
The Cascadia Threat
A Cascadia event is based on the threat of a catastrophic magnitude 9.0 Subduction Zone earthquake and resultant tsunami. Coastal counties will experience a devastating tsunami on top of severe ground shaking (up to five minutes). Shaking intensity will be less in the I-5 Corridor and Southern, Central, and Eastern Oregon, but older buildings may incur extended damage.
Expected Impacts
-
Ground shaking for 4-6 minutes causing massive critical infrastructure damage
-
Liquefaction and landslides causing disruption of transportation routes
-
Tsunami inundation to coastal areas with as little as 15 minutes warning
-
Up to 25,000 fatalities resulting from combined effects of earthquakes and tsunami
-
Tens of thousands of buildings and structures destroyed or damaged
-
Tens of thousands of people in need of shelter because of destroyed or damaged households
-
$30+ billion in economic loss
bottom of page