Earthquake zones are very tricky areas.
http://earthquake.usgs.gov/hazards/products/conterminous
3D computer model scenarios can reveal various potential seismic threats.
http://www.slocounty.ca.gov/OES/NPPInfo.htm
http://janetmortonrealtor.com/blog/?attachment_id=385
People get very pist off when this stuff is built in their part of the seismically active world.
http://www.sanluisobispo.com/2013/11/20/2795062/residents-give-nrc-an-earful-over.html
Perhaps sometimes its better to pretend there will be no more serious earthquakes in California.
http://www.sfgate.com/science/article/Panel-resists-Diablo-Canyon-quake-survey-4013966.php
http://www.sanluisobispo.com/2013/11/02/2763083/diablo-canyon-faces-deadlines.html
There are always new faults discovered, revealing another earthquake zone.
http://www.esri.com/software/mapping-for-everyone/nuclear-plant-proximity-map
http://www.sanluisobispo.com/2014/02/08/2915112/diablo-canyons-unit-2-resumes.html
Even if one can see into various potential future scenarios, its difficult to pinpoint the time & place of every disastrous event. Some see no reason for concern.
http://desertshapes.blogspot.ca/2014/02/john-hogue-nostradamus-prophecy-etc.html