Analyses by NASA's UAVSAR radar performed after the Bayou Corne, Louisiana, sinkhole formed show it was able to detect precursory ground surface movement of up to 10.2 inches (260 millimeters) more than a month before the sinkhole collapsed in August 2012. This interferogram was formed with images acquired on June 23, 2011 and July 2, 2012. Colors represent surface movement, with one full color wrap corresponding to 4.7 inches (120 millimeters) of displacement.
Image credit: NASA/JPL-Caltech
Note: For more information, see That Sinking Feeling.
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