The biggest earthquake in 25 years struck California’s Napa Valley in the early hours of 24 August 2014. Interferogram was generated, using Sentinel-1A images, acquired on 7th and 31st of August 2014. This interferogram shows how the ground moved during the quake. The maximum deformation is more than 10 cm, and an area of about 30x30 km was affected significantly. The image also clearly maps the infamous San Andreas Fault running along the coastline.
Despite this interferogram being computed with images acquired in the satellite's "stripmap mode", which is not going to be the default mode when operational, this result demonstrates the capability of Sentinel-1A and marks the beginning of a new era for our ability to map earthquakes from space.
For an extra analysis, including modeling and interpretation please see the blog post of Dr. John Elliot.
Sentinel-1 interferometric results are Derived Works of Copernicus data (2015), subject to the following use conditions: "TERMS AND CONDITIONS FOR THE USE AND DISTRIBUTION OF SENTINEL DATA".