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| Earthquake Epicenters and Magnitudes in the Crater Lake Region, 1920-1995 |
Earthquake hazards in the greater Crater Lake area are similar to those in other earthquake-prone areas, namely damage to structures, utilities, communication in as little as two minutes, such as from Chaski Bay to the boat landing at Cleetwood Cove. Volcanic, local tectonic, or distant Cascadia subduction zone earthquakes all could produce shaking adequate to trigger sliding of the fractured and poorly consolidated rock of the caldera walls and talus slopes. Earthquake shaking alone, without rapid entry of slide material into Crater Lake, would not be expected to cause dangerous waves.
