Land Subsidence in California

Data and Tools

Areas of Land Subsidence in California

Areas of Land Subsidence in California

Explore an interactive USGS map to learn more about areas in California affected by subsidence.

Explore Subsidence

Central Valley: Drought Indicators

Central Valley: Drought Indicators

Drought indicators in the Central Valley include declining groundwater levels and associated land subsidence as measured and estimated via multiple techniques.

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Filter Total Items: 8
Date published: February 11, 2019

Electromagnetic induction (EMI) geophysical data collected at the Bicycle Basin, U.S. Army Fort Irwin National Training Center, California

This data release presents raw (.csv) and processed (.csv) data files from land-based, frequency-domain electromagnetic induction (EMI) data collected at Bicycle Basin, U.S. Army Fort Irwin National Training Center, California. Data were collected during three distinct time periods: March 19, 2008 (1 survey), December 1 to December 5, 2014 (46 surveys) and December 4 to December 8, 2015 (62...

Date published: December 18, 2018

Mojave River and Morongo Groundwater Basins Data

Interactive map of the Mojave and Morongo groundwater basins.  Data layers include sites and data for groundwater levels, water quality, and land subsidence.  Groundwater data spans 1992 to the present.

Date published: December 17, 2018

California Groundwater Model Archive

The USGS models shown on this site are in the public domain, and are freely available. They are based on MODFLOW and other public-domain USGS software. Links to publications and web resources associated with each model are shown in the table next to the model map. The associated model files for some of these models are currently available via download.

Date published: December 17, 2018

Central Valley: Drought Indicators

During the recent droughts of 2007-2010 and 2012-2017, groundwater pumping has increased from the combined effects of the drought and land-use changes, re-initiating land subsidence. In order to document historical subsidence and monitor continued changes, the USGS has gathered and interpreted data from a variety of sources.

Date published: December 17, 2018

Benchmark Site Data | San Joaquin Valley, CA

These 5 northern benchmarks in the San Joaquin Valley are where the largest magnitude of subsidence was recently measured using repeat surveys. That doesn't mean these locations are where the largest magnitude of subsidence occurred, just where it's been measured. The southernmost benchmark in this set is where the largest magnitude was historically measured using repeat surveys.

Date published: December 17, 2018

Compaction | Data from Central Valley, CA Extensometers

Aquifer-system compaction has been monitored at selected locations for various periods with borehole extensometers by different agencies, including the USGS, DWR, SLDMWA, and CCID, and by Luhdorff and Scalmanini Consulting Engineers.  This dataset contains compaction data for 23 extensometers across California's Central Valley.

Date published: December 17, 2018

Continuous Global Positioning System (CGPS) Stations

The CGPS data were obtained from the UNAVCO Plate Boundary Observatory (PBO) network of continuously operating GPS stations. The PBO is the geodetic component of UNAVCO, a consortium of research institutions whose focus is measuring vertical and horizontal plate boundary deformation across the North American and Pacific Plates in the western U.S. using high-precision measurement techniques....

Date published: December 17, 2018

InSAR | Central Valley Areas of Interest

The InSAR technique uses two SAR scenes of the same area taken at different times which are then processed together to produce maps called interferograms that show relative land-surface-elevation change between the two SAR acquisition dates. This Areas of Interest dataset is where InSAR data has been interpreted to produce a time-history of subsidence in the Central Valley, CA.