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Earth, Planets and Space
Fig. 7 | Earth, Planets and Space

Fig. 7

From: Locating hydrothermal fluid injection of the 2018 phreatic eruption at Kusatsu-Shirane volcano with volcanic tremor amplitude

Fig. 7

a Locations of estimated tremor source. The color of each plot corresponds to a contour bar in b. Gray dots also show epicenters of volcanic earthquakes in Fig. 2. A plot with a green square is the fixed source location for the reference time window. b Analyzed filtered (5–20 Hz) vertical ground velocity at KSW, estimated source elevations, and the minimum \(RES\) value of each time window. The origin time of the horizontal axis is 09:59:00

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