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Map of California where elevation change is color coded, subsidence is color coded in shades of blue, darkest correlating to 50 millimeters annually, uplift maps to a max of 5 millimeters of rise annually. The map shows the central valley sinking most, particularly the southern part. The majority of the state is in a light blue with the mountainous regions showing some rise.

Where California’s Land Is Sinking and Rising

The elevation changes may seem small, amounting to fractions of inches per year, but they can increase or decrease local flood risk, wave exposure, and saltwater intrusion.

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