Seasonal Ground Water Storage in California (video) University of California - Berkeley Share Print E-Mail Loading video... Caption The distributed terrestrial groundwater storage is shown as a monthly time series derived from the GPS vertical time series from 2006 through 2014. The grey lines indicate the location of mapped faults. The green outline is the border of the Central Valley. Credit Image produced by Christopher Johnson, Berkeley Seismological Laboratory, UC Berkeley Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.