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NASA-produced damage maps may aid Mexico quake response

21 September 2017

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A NASA-produced map of areas likely damaged by the 19 September magnitude 7.1 Raboso earthquake near Mexico City has been provided to Mexican authorities to help responders and groups supporting the response efforts. The quake, which struck 75 miles (120 kilometres) south-east of Mexico City, caused significant loss of life and property damage.

To assist in the 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 Central Mexico, including Mexico City, affected by the quake, to identify areas of damage and produce what is known as a Damage Proxy Map. The imagery - acquired before the quake on 8 September, and again on 20 September, 2017, just 6-1/2 hours after the earthquake - is from the radar instrument on the Copernicus Sentinel-1A and Sentinel 1-B satellites operated by the European Space Agency.

Source: NASA

Image credit: NASA-JPL/Caltech/ESA/Copernicus/Google - NASA/JPL-Caltech-produced map of damage in and around Mexico City from the 19 September, 2017, magnitude 7.1 Raboso earthquake, based on ground and building surface changes detected by ESA satellites. Colour variations from yellow to red indicate increasingly more significant ground surface change.

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