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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Ambient noise tomography in the Naruko/Onikobe volcanic area, NE Japan: implications for geofluids and seismic activity

Fig. 2

Paste-ups of cross-correlation functions in the frequency bands of a 0.1–0.2 Hz and b 0.2–0.4 Hz. Cross-correlation functions are aligned depending on their back azimuth and interstation distance. Each waveform is averaged over every 2 km of interstation distance. Broken lines indicate the travel time of waves with a propagation velocity of 3 km/s

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