Exploration Technique: InSAR
|Exploration Technique Information|
|Exploration Group:||Remote Sensing Techniques|
|Exploration Sub Group:||Active Sensors|
|Parent Exploration Technique:||Radar|
|Information Provided by Technique|
|Hydrological:||Can give indications about subsurface geothermal fluid flow|
InSAR is a radar technique used in geodesy and remote sensing. This geodetic method uses two or more synthetic aperture radar (SAR) images to generate maps of surface deformation or digital elevation, using differences in the phase of the waves returning to the satellite or aircraft. The technique can potentially measure centimetre-scale changes in deformation over spans of days to years. It has applications for geophysical monitoring of natural hazards, for example earthquakes, volcanoes and landslides, and in structural engineering, in particular monitoring of subsidence and structural stability.
- Surface Subsidence Monitoring
- InSAR is largely used by the geothermal industry to monitor production-induced subsidence (Oppliger, et al., 2006), which has been an issue at numerous geothermal sites (Eneva, et al., 2007).
- More recently applied to look at deformation patterns resulting from the subsidence to map fault and fracture zone trends that may control fluid movement in the geothermal reservoir (Opplinger, et al., 2006).
- Geophysical monitoring of natural hazards (e.g., earthquakes, volcanoes, landslides, etc.)
- Monitoring of human induced subsidence (Burgmann, et al., 2000).
- Brady Hot Springs Area
- Central Nevada Seismic Zone Geothermal Region
- Coso Geothermal Area
- Desert Peak Area
- Dixie Valley Geothermal Area
- Medicine Lake Area
- North Brawley Geothermal Area
- Redfield Campus Area
- Salton Sea Area
- Walker-Lane Transition Zone Geothermal Region