Earth Imaging Journal: Remote Sensing, Satellite Images, Satellite Imagery
Breaking News
Artificial Intelligence has Great Strength in the Interpretation of Geodata
Potsdam, Frankfurt/Main, September 20, 2018. Everyone’s talking about artificial...
Map of the Month: Purchasing Power for Watches and Jewelry, Italy 2017
GfK's Map of the Month for September illustrates the...
Forward to the Moon: Airbus Wins ESA Studies for Future Human Base in Lunar Orbit
Bremen, 20 September 2018 – The European Space Agency...
Bluesky and Getmapping Win UK Gov Contract
Aerial mapping companies Bluesky and Getmapping are pleased to...
Mobile Mapping Market to Surpass $40bn by 2024: Global Market Insights, Inc.
The research report "Mobile Mapping Market Size, By Component...

March 12, 2014
NASA Eyes Radar for Sinkhole Prediction

Analyses by NASA’s UAVSAR after the Bayou Corne, La., sinkhole formed show it detected precursory ground movement of up to 10.2 inches (260 millimeters) more than a month before the sinkhole collapsed. Colors represent surface displacement; one full color wrap equals 4.7 inches (120 millimeters).

Findings suggest that radar data, if collected routinely from airborne systems or satellites, could in some cases foresee sinkholes before they happen, decreasing danger to people and property.

New analyses of NASA airborne radar data collected in 2012 reveal the radar detected indications of a huge sinkhole before it collapsed and forced evacuations near Bayou Corne, La., that year. Sinkholes are depressions in the ground formed when Earth surface layers collapse into caverns below. They usually form without warning. The data were collected as part of an ongoing NASA campaign to monitor sinking of the ground along the Louisiana Gulf Coast.

Researchers Cathleen Jones and Ron Blom of NASA's Jet Propulsion Laboratory (JPL) in Pasadena, Calif., analyzed interferometric synthetic aperture radar (InSAR) imagery of the area acquired during flights of the agency's Uninhabited Airborne Vehicle Synthetic Aperture Radar (UAVSAR), which uses a C-20A jet, in June 2011 and July 2012. InSAR detects and measures subtle deformations in Earth’s surface.

Their analyses showed the ground surface layer deformed significantly at least a month before the collapse, moving mostly horizontally up to 10.2 inches (260 millimeters) toward where the sinkhole would later form. These precursory surface movements covered a much larger area—about 1,640 by 1,640 feet (500 by 500 meters)—than that of the initial sinkhole, which measured about 2 acres (1 hectare).

Image courtesy of NASA/JPL-Caltech.

Read the full story.

Comments are closed.