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| Elevation differences in the crater were found between two airborne LIDAR surveys conducted in September 2003 and October 4, 2004. The image is a computer-generated representation of the October 4 topography. The superimposed colors indicate areas of change: areas where elevation has lowered between 0.5 to 30 meters (blue); areas where elevation has increased between 1.5 to 40 m, 40 m to 80 m, and 80 m to 120 m are green, yellow, and orange, respectively. (Credit: USGS and NASA) |
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