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Earth, Planets and Space
Figure 4 | Earth, Planets and Space

Figure 4

From: Source characteristics of ocean infragravity waves in the Philippine Sea: analysis of 3-year continuous network records of seafloor motion and pressure

Figure 4

Four examples of the average PSD distribution in the slowness vector domain. The average of PSD is taken over a frequency range between 0.005 and 0.025 Hz. The recorded day is shown at the top of each diagram. The radii of two dashed circles indicate the slowness values of 7 and 9 s/km. The amplitudes of the PSDs in each diagram are normalized by their maximum value. The slowness (incoming direction, velocity) values estimated from the position of the red peak are (a) 7.9 s/km (153°, 127 m/s); (b) 7.8 s/km (125°, 128 m/s), (c) 8.0 s/km (131°, 126 m/s), and (d) 7.8 s/km (153°, 128 m/s).

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