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This website provides information about observations of surface deformation at volcanoes around the world, guided by the Global Volcanism Program volcano list.

All the volcanoes in our index have a database entry detailing any recorded past deformation events, measured using satellite radar (InSAR) or ground-based methods (e.g., GPS, levelling or tilt).  Using data from a new satellite, ESA’s Sentinel-1, each volcano entry will also be updated with the most recent processed InSAR image.