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Earth, Planets and Space
Fig. 2 | Earth, Planets and Space

Fig. 2

From: Variations in seismic velocity distribution along the Ryukyu (Nansei-Shoto) Trench subduction zone at the northwestern end of the Philippine Sea plate

Fig. 2

Geophysical maps of the survey area. a Free-air gravity anomaly. b Shallow seismic activity. Black dots show epicenters with depths shallower than 60 km as determined by the Japan Metrological Agency (1923–2017 Feb. 20). Focal mechanisms are from GCMT Catalog by Global Centroid-Moment-Tensor Project (depth ≤ 60 km, 1976–2017 May 31). c Magnetic anomaly on bathymetry. The magnetic anomaly map is produced by a combination of our original data, CCOP (http://www.ccop.or.th/), and EMAG2 (doi:10.7289/V5MW2F2P)

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