ca_earthquake_072019/s1_dpm_20190710 (ImageServer)

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Service Description: Summary:The Advanced Rapid Imaging and Analysis (ARIA) team at NASA's Jet Propulsion Laboratory and California Institute of Technology, both in Pasadena, California, created this Damage Proxy Map (DPM) depicting areas that are likely damaged caused by the recent major earthquakes in California, including the M6.4 (July 4, 2019) and the M7.1 (July 5, 2019) events. The map was derived from synthetic aperture radar (SAR) images from the Copernicus Sentinel-1 satellites, operated by the European Space Agency (ESA). The images were taken before (July 4, 2019) and after (July 10, 2019) the sequence of earthquakes. The image covers an area of 250 by 300 kilometers (155 by 186 miles), shown by the large red polygon. Each pixel measures about 30 meters across. The color variation from yellow to red indicates increasingly more significant surface change. Preliminary validation was done by identifying liquefaction areas using the Planet's optical images taken before (July 2, 2019) and after (July 10, 2019) the earthquakes. This damage proxy map should be used as guidance to identify damaged areas, and may be less reliable over vegetated areas. For example, the scattered colored pixels over vegetated areas may be false positives, and the lack of colored pixels over vegetated areas does not necessarily mean no damage. Suggested Use:This damage proxy map shows surface change with yellow to red indiciating more significant change due to the recent earthquakes. The damage proxy map should be used as guidance to identify damaged areas and may be less reliable over vegetated areas. The lack of colored pixels over vegeated areas does not necessarily mean no damage.Satellite/Sensor:Copernicus Sentinel-1 Sythetic Aperture Radar (SAR)Resolution: 30 metersCredits:Contains modified Copernicus Sentinel data, processed by ESA. Analyzed by the NASA-JPL/Caltech ARIA team. This task was carried out at JPL funded by NASA.ESRI REST Endpoint:See URL on Right Side of the PageWMS Endpoint:

Name: ca_earthquake_072019/s1_dpm_20190710

Description: Summary:The Advanced Rapid Imaging and Analysis (ARIA) team at NASA's Jet Propulsion Laboratory and California Institute of Technology, both in Pasadena, California, created this Damage Proxy Map (DPM) depicting areas that are likely damaged caused by the recent major earthquakes in California, including the M6.4 (July 4, 2019) and the M7.1 (July 5, 2019) events. The map was derived from synthetic aperture radar (SAR) images from the Copernicus Sentinel-1 satellites, operated by the European Space Agency (ESA). The images were taken before (July 4, 2019) and after (July 10, 2019) the sequence of earthquakes. The image covers an area of 250 by 300 kilometers (155 by 186 miles), shown by the large red polygon. Each pixel measures about 30 meters across. The color variation from yellow to red indicates increasingly more significant surface change. Preliminary validation was done by identifying liquefaction areas using the Planet's optical images taken before (July 2, 2019) and after (July 10, 2019) the earthquakes. This damage proxy map should be used as guidance to identify damaged areas, and may be less reliable over vegetated areas. For example, the scattered colored pixels over vegetated areas may be false positives, and the lack of colored pixels over vegetated areas does not necessarily mean no damage. Suggested Use:This damage proxy map shows surface change with yellow to red indiciating more significant change due to the recent earthquakes. The damage proxy map should be used as guidance to identify damaged areas and may be less reliable over vegetated areas. The lack of colored pixels over vegeated areas does not necessarily mean no damage.Satellite/Sensor:Copernicus Sentinel-1 Sythetic Aperture Radar (SAR)Resolution: 30 metersCredits:Contains modified Copernicus Sentinel data, processed by ESA. Analyzed by the NASA-JPL/Caltech ARIA team. This task was carried out at JPL funded by NASA.ESRI REST Endpoint:See URL on Right Side of the PageWMS Endpoint:

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Copyright Text: NASA, NASA-JPL/Caltech ARIA Team, Copernicus Sentinel-1

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