GEOL 303 Lecture Notes - Lecture 19: Rose Canyon Fault, Juan De Fuca Plate, Active Fault
Document Summary
Subduction of the juan de fuca plate in the pacific nw has the potential of generating magnitude 8. 0 to 9. 0 earthquakes and related tsunami, similar to the 2004 and 2011 earthquakes in indonesia and japan. Considered moderately unsafe, moderate to high risk for an earthquake. Goes in the ocean and then goes on land, into san diego. Elsinore fault can cause damage to san diego, but not a devastating earthquake. Vertical offset of the waters, therefore san diego could not have a tsunami. Strike slip faults cannot produce a tsunami directly. If there was a landslide in the islands off of san diego, there could be a tsunami. There is high areas of liquefaction in coastal san diego. Only known active fault in san diego city. Spanish bight, coronado, and silver strand faults may also be related active faults. Last earthquake on the rose canyon fault occurred between 500-250 years ago.
