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Fig. 6.

image

Time-distance diagrams calculated along the path presented in Fig. 5. Left panel: detrended data; the white horizontal spaces are due to the lack of data. Right panel: as in left panel but gaps are interpolated by cosine fit with the assumption of the oscillatory trend of the data. Black lines mark positions of the same phase used to calculate the phase velocity. Numbers above lines give the calculated phase velocity at these positions.

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