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Earth, Planets and Space
Figure 8 | Earth, Planets and Space

Figure 8

From: Seismic imaging and velocity structure around the JFAST drill site in the Japan Trench: low V p, high V p/V s in the transparent frontal prism

Figure 8

P wave velocity model and measurements around the JFAST site. Red and green lines indicate the velocity models derived from PSDM analysis (CDP 8225) and OBS data analysis (JF1), respectively. Blue line is the averaged interval velocity estimated from the drilling (Expedition 343/343T scientists 2013). Cyan solid circle denotes the P wave velocity measured from the core samples under the controlled effective pressure. The velocity is estimated from the core experiments (Figure 10) at an in situ effective pressure calculated from the density profile, which was computed from the resistivity logging data (Expedition 343/343T scientists 2013). Note that the OBS location is 1 km north (see Figure 1b), and the water depth is deeper than the site C0019.

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