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Fig. 4. A series of four photos from a simulation of seismic waves: T1 (the time that the seismic pulse was generated): the source is located 30 cm from an asymmetrically aligned open ditch, where the left corner of the ditch is closer to source than the right corner. T2 (4 ms after the pulse was generated): a seismic wave reflected from the nearest obstacle wall. T3 (5.5 ms after time the pulse was generated): a seismic wave diffracted from the obstacle's closest corner. T4 (8 ms after the pulse was generated): a seismic wave diffracted from the obstacle's more distant corner. Stars indicate the location of the source and receiver (individual mole-rat).





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