New research challenges assumptions that the central part of the San Andreas fault would act as a barrier, preventing a big quake from traveling between the northern and southern parts of the state.

A recent article points to possibility that California could be hit by a statewide earthquake. The San Andreas fault was once thought to be a barrier that would prevent a statewide quake from happening, but now researchers say that assumption may be wrong.

The article appeared in the COPE newsletter (http://cope-preparedness.org/archives/2416). COPE stands for Community Outreach Promoting Emergency Preparedness.

The major earthquakes in Japan pointed researchers to the fact that "Using a combination of laboratory measurements and computer simulations, the two scientists showed how so-called creeping segments in a fault — long thought to be benign because they slip slowly and steadily along as tectonic plates shift — might behave like locked segments, which build up stress over time and then rupture.?

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