Earthscope Globe

Using GPS to Measure Soil Moisture, Snow Depth and Vegetation Growth


GPS data collected as part of PBO, though, contain additional information that is very useful in ways unforeseen when the original PBO science plan was created.
Strain rate, which is typically greatest within 10-50 km of an active fault, is calculated by taking the spatial derivative of measured crustal velocities.

Integrating GPS & InSAR to Resolve Stressing Rates Along the San Andreas System


By Bridget Smith-Konter, David T. Sandwell, and Meng Wei - Summer 2010

New estimates of seismic hazard (e.g., UCERF, will rely on high…, ,

Figure 2: Interferogram of the April 2010 earthquake in Baja California, Mexico, from ALOS PALSAR (Advanced Land Observing Satellite Phased Array type L-band Synthetic Aperture…, , ,

Figure 3: Remove-stack-restore interferograms for the Salton Sea area. (a) Physical model constrained by GPS data. (b) Stacked residual interferograms after applying the…,


Bird, P. (2009), Long-term fault slip rates, distributed deformation rates, and forecast of seismicity in the western United States from joint fitting of…

Earthscope Globe

U-Pb Thermochronology: 4-Dimensional Imaging of the North American Lithosphere


As the USArray Transportable Array marches eastward, seismic images are providing ever more detailed insight into present day structures of the crust and mantle beneath North America. But how old are these structures and what do they tell us about the geo