Fig. 4From: Backarc basin oceanic crust and uppermost mantle seismic velocity structure of the Shikoku Basin, south of JapanCheckerboard test results for the P-wave velocity models shown in Fig. 3. The size of the checker pattern is 10 km horizontally by 2.5 km vertically in the region shallower than 10 km for SPr10 and SPr7 and 11.25 km for SPr11. The size increases to 20 × 10 km for the deeper area.Back to article page