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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

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

Fig. 4

Examples of ray path coverage, phase velocity, and resolution maps. a Ray path coverage at 0.2 Hz. b Phase velocity perturbation map at 0.2 Hz. The triangles denote Quaternary volcanoes. The white rectangular boxes delineate the spatial extent of the aftershock area. c Diagonal elements of resolution matrix at 0.2 Hz. d, e, and f are the same as a, b, and c, respectively, but for 0.4 Hz

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