The European Space Agency’s Earth-monitoring Sentinels collected radar interferometry of the Napa Valley before and after the recent earthquake, highlighting ground deformation. Ground-truthing of surface ruptures is drawing a surprisingly complex picture of valley faults.
http://blogs.kqed.org/science/2014/09/02/napa-quake-forces-redrawing-of-fault-maps/
For more uses of radar interferometry, check out these unstable slopes in South America.
https://gizmodo.com/sentinel-satellite-reveals-the-aftermath-of-napas-earth-1629586029