NASA's Earthquake 'Damage Map' Shows Destruction in Mexico


NASA's Earthquake 'Damage Map' Shows Destruction in Mexico

A map of damage in and around Mexico City caused by the magnitude 7.1 Raboso earthquake of Sept. 19, 2017. Color variations from yellow to red indicate increasingly more significant ground surface change. The map was produced by scientists at NASA’s Jet Propulsion Laboratory and the California Institute of Technology, based on data gathered by the European Space Agency’s Copernicus Sentinel-1A and Sentinel-1B satellites.

Credit: NASA-JPL/Caltech/ESA/Copernicus/Google


A new satellite-imagery map could help Mexico respond more effectively to Tuesday’s (Sept. 19) powerful Raboso earthquake, which killed hundreds of people and damaged countless buildings.


The magnitude-7.1 Raboso quake hit about 75 miles (120 kilometers) southeast of Mexico City. Scientists at the California Institute of Technology and NASA’s Jet Propulsion Laboratory (JPL) produced the new “damage proxy map” using radar imagery of central Mexico that the European Space Agency’s Copernicus Sentinel-1A and Sentinel-1B satellites gathered before and after the temblor.


“The views indicate the extent of damage caused by the earthquake and subsequent aftershocks, based on changes to the ground surface detected by radar,” NASA officials wrote in a statement. [The 10 Biggest Earthquakes in History]


“The color variations from yellow to red indicate increasingly more significant ground and building surface change,” they added. “The map should be used as guidance to identify damaged areas, and may be less reliable over vegetated areas.”


NASA has given the map to Mexican authorities, agency officials said. A full-resolution version of it is available here: https://www.jpl.nasa.gov/spaceimages/details.php?id=pia21963


Sentinel-1A and Sentinel-1B aren’t the only satellites that have been eyeing Mexico after this week’s quake. The WorldView-2 satellite, which is operated by Colorado-based company DigitalGlobe, captured its own views Wednesday (Sept. 20).

Among the many buildings destroyed by the magnitude-7.1 earthquake that hit central Mexico on Sept. 19, 2017, were some at Enrique Rebsamen School in Mexico City. Image taken by DigitalGlobe’s WorldView-2 satellite.

Among the many buildings destroyed by the magnitude-7.1 earthquake that hit central Mexico on Sept. 19, 2017, were some at Enrique Rebsamen School in Mexico City. Image taken by DigitalGlobe’s WorldView-2 satellite.

Credit: Satellite image ©2017 DigitalGlobe


DigitalGlobe has publicly released pre- and post-quake imagery to help with the response effort, company representatives said.

Another WorldView-2 image of Mexico City a day after the magnitude-7.1 quake of Sept. 19, 2017.

Another WorldView-2 image of Mexico City a day after the magnitude-7.1 quake of Sept. 19, 2017.

Credit: Satellite image ©2017 DigitalGlobe


The Caltech and JPL team — who work together as part of the NASA-funded Advanced Rapid Imaging and Analysis project — also created a damage proxy map after a magnitude-8.1 earthquake struck the Pacific coast of southern Mexico on Sept. 7. You can see that map, which also used Sentinel-1A and Sentinel-1B data, here: https://photojournal.jpl.nasa.gov/catalog/PIA21956


Follow Mike Wall on Twitter @michaeldwall and Google+. Follow us @Spacedotcom, Facebook or Google+. Originally published on Space.com.



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