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Earth, Planets and Space
Fig. 12 | Earth, Planets and Space

Fig. 12

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

Fig. 12

Velocity cross sections in the 100-m cell model for the upper crust beneath the Aira caldera: (a) velocity distribution and (b) velocity perturbation distribution. The region surrounded by red contour lines in (a) indicates a velocity of 6.8 km/s for the high-velocity zone (HVZ). The upper LVZ indicates a slightly lower-velocity zone (5.6 km/s). Cross and plus symbols indicate the spherical pressure sources-A and -B estimated by Hotta et al. (2016) and Iguchi et al. (2013), respectively. Volcano-tectonic (VT) earthquakes (white circles) are also plotted. Other symbols are same as those in Fig. 7

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