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Measuring Human-induced Land Subsidence from Space

Satellite Interferometric Synthetic Aperture Radar (InSAR) is a revolutionary technique that allows scientists to measure and map changes on the Earth's surface as small as a few millimeters. By bouncing radar signals off the ground surface from the same point in space but at different times, the radar satellite can measure the change in distance between the satellite and ground (range change) as the land surface uplifts or subsides. Maps of relative ground-surface change (interferograms) are constructed from the InSAR data to help scientists understand how ground-water pumping, hydrocarbon production, or other human activities cause the land surface to uplift or subside. Interferograms developed by the USGS for study areas in California, Nevada, and Texas are used in this Fact Sheet to demonstrate some of the applications of InSAR to assess human-induced land deformation.

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Date Of Record Release 2009-11-05 15:01:52
Description Satellite Interferometric Synthetic Aperture Radar (InSAR) is a revolutionary technique that allows scientists to measure and map changes on the Earth's surface as small as a few millimeters. By bouncing radar signals off the ground surface from the same point in space but at different times, the radar satellite can measure the change in distance between the satellite and ground (range change) as the land surface uplifts or subsides. Maps of relative ground-surface change (interferograms) are constructed from the InSAR data to help scientists understand how ground-water pumping, hydrocarbon production, or other human activities cause the land surface to uplift or subside. Interferograms developed by the USGS for study areas in California, Nevada, and Texas are used in this Fact Sheet to demonstrate some of the applications of InSAR to assess human-induced land deformation.
Classification
Resource Type
Subject
Source United States Geological Survey
Keyword Radar, Satellites
Selector Bates
Date Of Record Creation 2009-11-05 14:57:05
Education Level
Date Last Modified 2010-05-10 13:46:43
Language English
Date Record Checked: 2009-11-05 00:00:00 (W3C-DTF)

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