Earthquakes
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Ground shaking from earthquakes on local faults and on the
distant Cascadia subduction zone poses a hazard to structures at Crater Lake.
Earthquakes may trigger landslides and rock falls that may not only threaten
roads and trails but also may cause destructive waves on Crater Lake itself.
Below we consider the historic record and the geologic evidence for the types of
earthquakes likely to affect the Crater Lake area.