Environmental
What is the 'Cascadia Subduction Zone' and why is it significant for Oregon real estate?
AA fault line only affecting eastern Oregon
BA major offshore fault zone capable of producing magnitude 8–9 earthquakes and tsunamis that could devastate Oregon coastal and valley areas — a material risk factor for property owners✓ Correct
CA volcanic zone affecting only the Cascade Mountains
DA geographic feature affecting only government-owned land
Explanation
The Cascadia Subduction Zone (CSZ) is the boundary between the Juan de Fuca and North American tectonic plates located 50–100 miles off the Oregon coast. It is capable of producing megathrust earthquakes of magnitude 8.0–9.2 and associated tsunamis. Oregon real estate agents, especially for coastal and low-lying valley properties, must understand and disclose this significant natural hazard risk.
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