Geological processes are at work 24-7… 365 days a year-all over dynamic planet Earth. Gaze out on the Pacific Ocean. “Look out at the horizon. What do you see?”A good spot to fish, place for beautiful sunsets, where storms roll in, clouds? “Look again at the horizon- that’s where the subducting plate boundary is.”On the Oregon Coast, that’s what’s on our tectonic plate. It’s an impacting visual reminder that plate tectonics are at work close by …A subduction zone is formed where the edge of the Juan De Fuca Plate converges with the North American Plate way beneath the ocean floor.The North American Plate is formed by continental crust which is thicker than the oceanic crust that forms the Juan De Fuca plate. The subducting plate boundary is the result where the oceanic crust slides beneath the continental crust. In the plate tectonics of the Pacific Northwest, this geologic configuration is known as the Cascadia Subduction Zone.Subduction zones are of extreme concern by geologists. This is where deeper earthquakes tend to occur. Experts say it’s not a matter of if; it’s a matter of when the Cascadia Subduction Zone will unleash earthquake forcesstrong enough to trigger a catastrophic tsunami event along the Oregon Coast.
Evacuation Locations: Where to Converge in the event of a Tsunami
The first 20-25 minutes are most critical for survival. Reaction time starts ticking when the earthquake commences. While the shaking occurs, escape is delayed by “take cover, and hold.” Then… it’s paramount to maximize those precious escape minutes.
TsunamiEvac – NW
Cell phone app. Click on the image for more information.
Evaucation Maps Oregon Department of Geology and Mineral Industries
Collection of 131 maps show tsunami inundation zones. Two zones are depicted on area specific maps to illustrate (1) inundation in the event of a distant tsunami; and, (2) inundation in the event of a local tsunami, such as one originating from the Cascadia Subduction zone offshore. The maps also outline evacuation routes people can take to escape.
The maps are available for free in PDF format. Click on the map icon below. Scroll down the webpage for a list of evacuation map-links for specific Oregon coastal communities.