Location of an Aircraft Impact from Gravity Waves.
The energy released upon impact of an airliner that crashed into Lake Pontchartrain, Louisiana, on 25 February 1964 caused changes in water levels of sufficient duration and amplitude to be recorded by tide gages situated within the lake. Analysis of the recorded arrival times made it possible to locate the point of impact within an irregular area approximately 1500 feet (500 meters) in radius.
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