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The Hosgri Fault is an offshore fault zone located near the coast of Southern California. It stretches for about 140 kilometers and the communities closest to it are Cambria, San Simeon, Morro Bay, and Surf. Its last major earthquake occurred on November 4, 1927 with a magnitude of 7.3 on the Richter scale. [1]
As shown on the map at left, the predicted probability of a major earthquake on this fault within the next 30 years is relatively low, only 3%.
Fault Information
The Hosgri Fault is a component of the San Andreas Fault system.[2]It is a reverse and thrust fault with possible magnitudes of 6.5 and 7.5 on the Richter scale. Seismologists monitor activity on the Hosgri fault constantly because of its physical proximity to the Diablo Canyon nuclear power plant. In fact, the fault lies only 2-1/2 miles offshore from the plant site.[3]
See also
References
- ^ "Hosgri Fault Zone." Southern California Earthquake Data Center. Southern California Earthquake Data Center, n.d. Web. 12 Oct. 2009. <http://www.data.scec.org/fault_index/hosgri.html>.
- ^ Graham, S. A., and W. R. Dickinson. "Evidence for 115 Kilometers of Right Slip on the San Gregorio-Hosgri Fault Trend." Science 199.4325 (1978): 179-181. Print.
- ^ Smith, R. Jeffrey. "A Seismological Shoot-Out at Diablo Canyon ." Science 214.4520 (1981): 528-529. Print.