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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: Earth-shaking J. LEAGUE supporters

Fig. 4

Spectra plots of UD components at Stations 1145, 1149, and E.KW8M between 14:30 and 14:32. A black vertical line “ × 1” represents the lowest characteristic frequency observed at the two stations, which is 2.4 Hz. Black vertical lines “ × 2”, “ × 3”, and “× 4” epresents two to four multiples of the lowest characteristic frequency (i.e., 4.8, 7.2, and 9.6 Hz, respectively)

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