Subsidence and Uplift in the Santa Clara Valley, 1997
By Land Subsidence in California
1997 (approx.)

Detailed Description
Interferogram of Santa Clara Valley, California, shows patterns of subsidence and uplift occurring over 7 months in 1997, from January 4 to August 2. A central subsidence zone, (red) the result of seasonal groundwater pumping, is fully recoverable.
Sources/Usage
Public Domain.