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First Quake Map of California in 16 Years Shows 50 New Fault Lines

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For the first time in 16 years, the California Geological Survey has released an updated state map showing all the surface fault lines, including 50 new ones. Available online, making it the first digital release of such a map, this fourth-ever collection of fault information is aimed to help "policymakers, planners, geologists, the mineral industry and even the insurance industry," according to the OC Register, and "will hopefully be used to enhance earthquake preparedness," notes the LA Times.

To help the public understand the maps a color-coding system is used. Faults are marked from black to red; "the closer to red, the more recently the fault has been active." However, only "surface" faults are illustrated on the maps, which means a fault, like the one that caused the 1994 Northridge earthquake, are not shown.

Since the last maps were assembled there have been 50 new fault line discovered in California, including the Newport-Inglewood fault, thought to be "one of the most dangerous according to the state’s geologist."