By Lisa Meadows

SACRAMENTO (CBS13) — The California Geological Survey released official maps today pinpointing new, and revising older fault & seismic hazard zones.

Four fault zone maps were released along with 10 seismic hazard zones.

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One of the fault zones was in the Napa area where the 2014 earthquake occurred. Before this study was conducted, geologists knew there was a fault in the area, but not a definitive answer until now.

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In order to build on the locations identified on the map a seismic safety study will have to be done (with the exception of a small family home).

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This study will identify exactly where the fault line lies and ensures that no new structures are built upon these fault lines.