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Earth, Planets and Space
Fig. 3 | Earth, Planets and Space

Fig. 3

From: Characteristics of seismicity in the southern Okinawa Trough and their relation to back-arc rifting processes

Fig. 3

a Map-view distribution of b values and b its relation to submarine volcanoes, hydrothermal vent sites and magmatic intrusions. A high-b-value zone between the rift axes and the island arc (red arrow) agrees well with the iso-depth contour of the subducting Philippine Sea plate of 80 km (Yamamoto et al. 2018) and may suggest a potential volcanic front. Contour lines for b values are drawn every 0.2. Other legends used here are same as Fig. 1

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