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NASA damage map aids Puerto Rico hurricane response

28 September 2017

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A NASA-produced map showing areas of eastern Puerto Rico that were likely damaged by Hurricane Maria has been provided to responding agencies, including the Federal Emergency Management Agency (FEMA). The hurricane, a Category 4 storm at landfall on Puerto Rico on 20 September, caused widespread damage and numerous casualties on the Caribbean island, an unincorporated U.S. territory with a population of about 3.4 million.

To assist in disaster response efforts, scientists at NASA's Jet Propulsion Laboratory and Caltech, both in Pasadena, California, obtained and used before-and-after interferometric synthetic aperture radar (InSAR) satellite imagery of areas of Eastern Puerto Rico to identify the areas that are likely damaged. The imagery - acquired before the storm on 25 March, 2017 and again one day after landfall on 21 September, 2017 - is from the radar instruments on the Copernicus Sentinel-1 satellites operated by the European Space Agency.

Source: NASA

Image credit: NASA-JPL/Caltech/ESA/Copernicus/Google - Caltech-produced map of damage in and around San Juan, Puerto Rico (orange inset box) from Hurricane Maria, based on ground and building surface changes detected by ESA satellites. Colour variations from yellow to red indicate increasingly more significant ground and building surface change.

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