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

Fig. 4

From: Solidified magma reservoir derived from active source seismic experiments in the Aira caldera, southern Kyushu, Japan

Fig. 4

Examples of the recorded sections for the offshore airgun sources: (a) AB1188, (b) AB1314, (c) AD2215, (d) AD2537, and (e) a map showing the airgun locations (red crosses) of AB1188, AB1314, AD2215 and AD2537. Each trace was digitally bandpass filtered (4–20 Hz) to suppress ground noise and normalized by its maximum amplitude. Reduction velocity was taken to be 6.0 km/s. Red and blue circles indicate the observed and calculated travel-times, respectively

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